Make LoadMbrolaTable return espeak_ng_STATUS.

src/include/espeak-ng/espeak_ng.h

 	ENS_NOT_INITIALIZED          = 0x100004FF,
 	ENS_AUDIO_ERROR              = 0x100005FF,
 	ENS_VOICE_NOT_FOUND          = 0x100006FF,
+	ENS_MBROLA_NOT_FOUND         = 0x100007FF,
+	ENS_MBROLA_VOICE_NOT_FOUND   = 0x100008FF,
 } espeak_ng_STATUS;
 
 typedef enum {

src/libespeak-ng/synth_mbrola.c

 
 #include "config.h"
 
+#include <errno.h>
 #include <stdio.h>
 #include <ctype.h>
 #include <wctype.h>
 static int mbrola_control = 0;
 static int mbr_name_prefix = 0;
 
-espeak_ERROR LoadMbrolaTable(const char *mbrola_voice, const char *phtrans, int *srate)
+espeak_ng_STATUS LoadMbrolaTable(const char *mbrola_voice, const char *phtrans, int *srate)
 {
 	// Load a phoneme name translation table from espeak-data/mbrola
 
 	if (mbrola_voice == NULL) {
 		samplerate = samplerate_native;
 		SetParameter(espeakVOICETYPE, 0, 0);
-		return EE_OK;
+		return ENS_OK;
 	}
 
 	sprintf(path, "%s/mbrola/%s", path_home, mbrola_voice);
 #ifdef PLATFORM_WINDOWS
 	if (load_MBR() == FALSE) { // load mbrola.dll
 		fprintf(stderr, "Can't load mbrola.dll\n");
-		return EE_INTERNAL_ERROR;
+		return ENS_MBROLA_NOT_FOUND;
 	}
 #endif
 
 	if (init_MBR(path) != 0) // initialise the required mbrola voice
-		return EE_NOT_FOUND;
+		return ENS_MBROLA_VOICE_NOT_FOUND;
 
 	setNoError_MBR(1); // don't stop on phoneme errors
 
 	sprintf(path, "%s/mbrola_ph/%s", path_home, phtrans);
 	size = GetFileLength(path);
 	if ((f_in = fopen(path, "rb")) == NULL) {
+		int error = errno;
 		close_MBR();
-		return EE_NOT_FOUND;
+		return error;
 	}
 
 	if ((mbrola_tab = (MBROLA_TAB *)realloc(mbrola_tab, size)) == NULL) {
 		fclose(f_in);
 		close_MBR();
-		return EE_INTERNAL_ERROR;
+		return ENOMEM;
 	}
 
 	mbrola_control = Read4Bytes(f_in);
 		SetParameter(espeakVOICETYPE, 1, 0);
 	strcpy(mbrola_name, mbrola_voice);
 	mbrola_delay = 1000; // improve synchronization of events
-	return EE_OK;
+	return ENS_OK;
 }
 
 static int GetMbrName(PHONEME_LIST *plist, PHONEME_TAB *ph, PHONEME_TAB *ph_prev, PHONEME_TAB *ph_next, int *name2, int *split, int *control)

src/libespeak-ng/synthesize.h

 extern int n_soundicon_tab;
 extern SOUND_ICON soundicon_tab[N_SOUNDICON_TAB];
 
-espeak_ERROR LoadMbrolaTable(const char *mbrola_voice, const char *phtrans, int *srate);
+espeak_ng_STATUS LoadMbrolaTable(const char *mbrola_voice, const char *phtrans, int *srate);
 espeak_ng_STATUS SetParameter(int parameter, int value, int relative);
 int MbrolaTranslate(PHONEME_LIST *plist, int n_phonemes, int resume, FILE *f_mbrola);
 int MbrolaGenerate(PHONEME_LIST *phoneme_list, int *n_ph, int resume);

src/libespeak-ng/voices.c

 
 			name2[0] = 0;
 			sscanf(p, "%s %s %d", name1, name2, &srate);
-			if (LoadMbrolaTable(name1, name2, &srate) != EE_OK)
+			if (LoadMbrolaTable(name1, name2, &srate) != ENS_OK)
 				fprintf(stderr, "mbrola voice not found\n");
 			voice->samplerate = srate;
 		}