Remove the unused size parameter in the sync_espeak_Synth commands.

src/libespeak-ng/espeak_command.c

 	case ET_TEXT:
 	{
 		t_espeak_text *data = &(the_command->u.my_text);
-		sync_espeak_Synth(data->unique_identifier, data->text, data->size,
+		sync_espeak_Synth(data->unique_identifier, data->text,
 		                  data->position, data->position_type,
 		                  data->end_position, data->flags, data->user_data);
 	}
 	case ET_MARK:
 	{
 		t_espeak_mark *data = &(the_command->u.my_mark);
-		sync_espeak_Synth_Mark(data->unique_identifier, data->text, data->size,
+		sync_espeak_Synth_Mark(data->unique_identifier, data->text,
 		                       data->index_mark, data->end_position, data->flags,
 		                       data->user_data);
 	}

src/libespeak-ng/espeak_command.h

 
 int delete_espeak_command(t_espeak_command *the_command);
 
-espeak_ERROR sync_espeak_Synth(unsigned int unique_identifier, const void *text, size_t size,
+espeak_ERROR sync_espeak_Synth(unsigned int unique_identifier, const void *text,
                                unsigned int position, espeak_POSITION_TYPE position_type,
                                unsigned int end_position, unsigned int flags, void *user_data);
-espeak_ERROR sync_espeak_Synth_Mark(unsigned int unique_identifier, const void *text, size_t size,
+espeak_ERROR sync_espeak_Synth_Mark(unsigned int unique_identifier, const void *text,
                                     const char *index_mark, unsigned int end_position,
                                     unsigned int flags, void *user_data);
 void sync_espeak_Key(const char *key);

src/libespeak-ng/speech.c

 		ep->id.number = value;
 }
 
-espeak_ERROR sync_espeak_Synth(unsigned int unique_identifier, const void *text, size_t size,
+espeak_ERROR sync_espeak_Synth(unsigned int unique_identifier, const void *text,
                                unsigned int position, espeak_POSITION_TYPE position_type,
                                unsigned int end_position, unsigned int flags, void *user_data)
 {
-	(void)size; // unused
-
 	espeak_ERROR aStatus;
 
 	InitText(flags);
 	return aStatus;
 }
 
-espeak_ERROR sync_espeak_Synth_Mark(unsigned int unique_identifier, const void *text, size_t size,
+espeak_ERROR sync_espeak_Synth_Mark(unsigned int unique_identifier, const void *text,
                                     const char *index_mark, unsigned int end_position,
                                     unsigned int flags, void *user_data)
 {
-	(void)size; // unused
-
 	espeak_ERROR aStatus;
 
 	InitText(flags);
                                      unsigned int end_position, unsigned int flags,
                                      unsigned int *unique_identifier, void *user_data)
 {
+	(void)size; // unused
+
 	if (f_logespeak) {
 		fprintf(f_logespeak, "\nSYNTH posn %d %d %d flags 0x%x\n%s\n", position, end_position, position_type, flags, (const char *)text);
 		fflush(f_logespeak);
 	*unique_identifier = 0;
 
 	if (my_mode & ENOUTPUT_MODE_SYNCHRONOUS)
-		return sync_espeak_Synth(0, text, size, position, position_type, end_position, flags, user_data);
+		return sync_espeak_Synth(0, text, position, position_type, end_position, flags, user_data);
 
 #ifdef USE_ASYNC
 	// Create the text command
                                           unsigned int *unique_identifier,
                                           void *user_data)
 {
+	(void)size; // unused
+
 	espeak_ERROR a_error = EE_OK;
 	static unsigned int temp_identifier;
 
 	*unique_identifier = 0;
 
 	if (my_mode & ENOUTPUT_MODE_SYNCHRONOUS)
-		return sync_espeak_Synth_Mark(0, text, size, index_mark, end_position, flags, user_data);
+		return sync_espeak_Synth_Mark(0, text, index_mark, end_position, flags, user_data);
 
 #ifdef USE_ASYNC
 	// Create the mark command