ecore_audio: Add missing break in switch-clause in format_set

Thanks coverity for finding that

Signed-off-by: Daniel Willmann <d.willmann@samsung.com>

src/lib/ecore_audio/ecore_audio_obj_out_sndfile.c

@@ -158,6 +158,7 @@ static void _format_set(Eo *eo_obj, void *_pd, va_list *list)
   switch (format) {
     case ECORE_AUDIO_FORMAT_AUTO:
       obj->sfinfo.format = 0;
+      break;
     case ECORE_AUDIO_FORMAT_WAV:
       obj->sfinfo.format = SF_FORMAT_WAV|SF_FORMAT_PCM_16;
       break;