Map the correct espeak-ng status codes to EE_NOT_FOUND.

src/libespeak-ng/espeak_api.c

 #include "speak_lib.h"
 #include "espeak_ng.h"
 
-#include <errno.h>
 #include <stdlib.h>
 #if HAVE_STDINT_H
 #include <stdint.h>
 {
 	switch (status)
 	{
-	case ENS_OK:               return EE_OK;
-	case ENOENT:               return EE_NOT_FOUND;
-	case ENS_VOICE_NOT_FOUND:  return EE_NOT_FOUND;
-	case ENS_FIFO_BUFFER_FULL: return EE_BUFFER_FULL;
-	default:                   return EE_INTERNAL_ERROR;
+	case ENS_OK:                     return EE_OK;
+	case ENS_VOICE_NOT_FOUND:        return EE_NOT_FOUND;
+	case ENS_MBROLA_NOT_FOUND:       return EE_NOT_FOUND;
+	case ENS_MBROLA_VOICE_NOT_FOUND: return EE_NOT_FOUND;
+	case ENS_FIFO_BUFFER_FULL:       return EE_BUFFER_FULL;
+	default:                         return EE_INTERNAL_ERROR;
 	}
 }