bin/media_client: return 0 on success

In MediaPlay.cpp, media_play returns non-zero value on failure but forgets to return zero on success.

Coverity CID: 1422617

Signed-off-by: Augustin Cavalier <waddlesplash@gmail.com>

src/bin/media_client/MediaPlay.cpp

@@ -111,4 +111,6 @@ int media_play(const char* uri)
 
 	delete player;
 	delete playFile;
+
+	return 0;
 }