option_waveout is no longer used in libespeak-ng, so remove it

src/libespeak-ng/speech.c

 	option_device = device;
 	my_mode = output_mode;
 	my_audio = NULL;
-	option_waveout = 1; // inhibit portaudio callback from wavegen.cpp
 	out_samplerate = 0;
 
 	// buflength is in mS, allocate 2 bytes per sample

src/libespeak-ng/translate.h

 #define OPTION_EMPHASIZE_ALLCAPS  0x100
 #define OPTION_EMPHASIZE_PENULTIMATE 0x200
 extern int option_tone_flags;
-extern int option_waveout;
 extern int option_quiet;
 extern int option_phonemes;
 extern int option_phoneme_events;

src/libespeak-ng/wavegen.c

 voice_t *wvoice;
 
 FILE *f_log = NULL;
-int option_waveout = 0;
 static int option_harmonic1 = 10;
 static int flutter_amp = 64;
 
 	PaError err, err2;
 	PaError active;
 
-	if (option_waveout || option_quiet) {
+	if (option_quiet) {
 		// writing to WAV file, not to portaudio
 		return 0;
 	}