ensure that the memory allocated by espeak_ListVoices is cleaned up on exit.

src/speak_lib.cpp

@@ -1192,6 +1192,7 @@ ESPEAK_API espeak_ERROR espeak_Synchronize(void)
 
 
 extern void FreePhData(void);
+extern void FreeVoiceList(void);
 
 ESPEAK_API espeak_ERROR espeak_Terminate(void)
 {//===========================================
@@ -1214,6 +1215,7 @@ ESPEAK_API espeak_ERROR espeak_Terminate(void)
 	Free(outbuf);
 	outbuf = NULL;
 	FreePhData();
+	FreeVoiceList();
 
 	if(f_logespeak)
 	{

src/voices.cpp

@@ -1744,6 +1744,18 @@ espeak_ERROR SetVoiceByProperties(espeak_VOICE *voice_selector)
 	return(EE_OK);
 }  //  end of SetVoiceByProperties
 
+void FreeVoiceList()
+{
+	for(int ix=0; ix<n_voices_list; ix++)
+	{
+		if(voices_list[ix] != NULL)
+		{
+			free(voices_list[ix]);
+			voices_list[ix] = NULL;
+		}
+	}
+	n_voices_list = 0;
+}
 
 
 
@@ -1763,13 +1775,7 @@ ESPEAK_API const espeak_VOICE **espeak_ListVoices(espeak_VOICE *voice_spec)
 	char path_voices[sizeof(path_home)+12];
 
 	// free previous voice list data
-
-	for(ix=0; ix<n_voices_list; ix++)
-	{
-		if(voices_list[ix] != NULL)
-			free(voices_list[ix]);
-	}
-	n_voices_list = 0;
+	FreeVoiceList();
 
 	sprintf(path_voices,"%s%cvoices",path_home,PATHSEP);
 	len_path_voices = strlen(path_voices)+1;