Fix bug Segmentation fault text2wave when setting new voice

Replace content of text2wave in /usr/bin/text2wave with:

#!/bin/sh
"true" ; exec /usr/bin/festival --script $0 $*
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;-*-mode:scheme-*-
;;                                                                       ;;
;;                Centre for Speech Technology Research                  ;;
;;                     University of Edinburgh, UK                       ;;
;;                       Copyright (c) 1996,1997                         ;;
;;                        All Rights Reserved.                           ;;
;;                                                                       ;;
;;  Permission is hereby granted, free of charge, to use and distribute  ;;
;;  this software and its documentation without restriction, including   ;;
;;  without limitation the rights to use, copy, modify, merge, publish,  ;;
;;  distribute, sublicense, and/or sell copies of this work, and to      ;;
;;  permit persons to whom this work is furnished to do so, subject to   ;;
;;  the following conditions:                                            ;;
;;   1. The code must retain the above copyright notice, this list of    ;;
;;      conditions and the following disclaimer.                         ;;
;;   2. Any modifications must be clearly marked as such.                ;;
;;   3. Original authors' names are not deleted.                         ;;
;;   4. The authors' names are not used to endorse or promote products   ;;
;;      derived from this software without specific prior written        ;;
;;      permission.                                                      ;;
;;                                                                       ;;
;;  THE UNIVERSITY OF EDINBURGH AND THE CONTRIBUTORS TO THIS WORK        ;;
;;  DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING      ;;
;;  ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT   ;;
;;  SHALL THE UNIVERSITY OF EDINBURGH NOR THE CONTRIBUTORS BE LIABLE     ;;
;;  FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES    ;;
;;  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN   ;;
;;  AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,          ;;
;;  ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF       ;;
;;  THIS SOFTWARE.                                                       ;;
;;                                                                       ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;           Author:  Alan W Black
;;;           Date:    November 1997
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;;;
;;;  Text to a single waveform like festival_client but without
;;;  starting the server
;;;

;;; Because this is a --script type file I has to explicitly
;;; load the initfiles: init.scm and user's .festivalrc
(load (path-append libdir "init.scm"))

;;; Process command line arguments
(define (text2wave_help)
  (format t "%s\n"
  "text2wave [options] textfile
  Convert a textfile to a waveform
  Options
  -mode <string>  Explicit tts mode.
  -o ofile        File to save waveform (default is stdout).
  -otype <string> Output waveform type: ulaw, snd, aiff, riff, nist etc.
                  (default is riff)
  -F <int>        Output frequency.
  -scale <float>  Volume factor
  -eval <string>  File or lisp s-expression to be evaluated before
                  synthesis.
")
  (quit))

;;; No gc messages
(gc-status nil)

;;; Default argument values
(defvar outfile "-")
(defvar output_type 'riff)
(defvar frequency nil)  ;; default is no frequency modification
(defvar text_files '("-"))
(defvar mode nil)
(defvar volume "1.0")
(defvar wavefiles nil)

;;; Get options
(define (get_options)

  (let ((files nil)
 (o argv))
    (if (or (member_string "-h" argv)
     (member_string "-help" argv)
     (member_string "--help" argv)
     (member_string "-?" argv))
 (text2wave_help))
    (while o
      (begin
 (cond
  ((string-equal "-o" (car o))
   (if (not (cdr o))
       (text2wave_error "no output file specified"))
   (set! outfile (car (cdr o)))
   (set! o (cdr o)))
  ((string-equal "-otype" (car o))
   (if (not (cdr o))
       (text2wave_error "no output filetype specified"))
   (set! output_type (car (cdr o)))
   (set! o (cdr o)))
  ((or (string-equal "-f" (car o)) ;; for compatibility and memory loss
       (string-equal "-F" (car o)))
   (if (not (cdr o))
       (text2wave_error "no frequency specified"))
   (set! frequency (car (cdr o)))
   (set! o (cdr o)))
  ((string-equal "-scale" (car o))
   (if (not (cdr o))
       (text2wave_error "no scale specified"))
   (set! volume (car (cdr o)))
   (set! o (cdr o)))
  ((string-equal "-mode" (car o))
   (if (not (cdr o))
       (text2wave_error "no mode specified"))
   (set! mode (car (cdr o)))
   (set! o (cdr o)))
  ((string-equal "-eval" (car o))
   (if (not (cdr o))
       (text2wave_error "no file specified to load"))
   (if (string-matches (car (cdr o)) "^(.*")
       (eval (read-from-string (car (cdr o))))
       (load (car (cdr o))))
   (set! o (cdr o)))
  (t
   (set! files (cons (car o) files))))
 (set! o (cdr o))))
    (if files
 (set! text_files (reverse files)))))

(define (text2wave_error message)
  (format stderr "%s: %s\n" "text2wave" message)
  (text2wave_help))

(define (save_record_wave utt)
"Saves the waveform and records its so it can be joined into a 
a single waveform at the end."
  (let ((fn (make_tmp_filename)))
    (utt.save.wave utt fn)
    (set! wavefiles (cons fn wavefiles))
    utt))

(define (combine_waves)
  "Join all the waves together into the desired output file
and delete the intermediate ones."
  (let ((wholeutt (Utterance Text "")))
    (mapcar
     (lambda (d) 
       (utt.import.wave wholeutt d t)
       (delete-file d))
     (reverse wavefiles))
    (if frequency
 (utt.wave.resample wholeutt (parse-number frequency)))
    (if (not (equal? volume "1.0"))
 (begin
   (format t "doing v\n")
   (utt.wave.rescale wholeutt (parse-number volume))))
    (utt.save.wave wholeutt outfile output_type)
    ))

;;;
;;; Redefine what happens to utterances during text to speech 
;;;
(set! tts_hooks (list utt.synth save_record_wave))

(define (main)
  (get_options)

  ;; do the synthesis
  (mapcar
   (lambda (f) 
     (if mode
  (tts_file f mode)
  (tts_file f (tts_find_text_mode f auto-text-mode-alist))))
   text_files)

  ;; Now put the waveforms together at again
  (combine_waves)
)

;;;  Do the work
(main)