when filling mp3 buffer, check if its already full. If it is, then give up trying to read in a potential mp3 frame, cause no mp3 frame should be bigger than the input buffer

git-svn-id: https://svn.musicpd.org/mpd/trunk@2950 09075e82-0dd4-0310-85a5-a0d7c8717e4f

src/inputPlugins/mp3_plugin.c

@@ -187,6 +187,10 @@ int fillMp3InputBuffer(mp3DecodeData * data) {
 		remaining = 0;
 	}
 
+	/* we've exhausted the read buffer, so give up!, these potential
+	 * mp3 frames are way too big, and thus unlikely to be mp3 frames */
+	if(readSize == 0) return -1;
+
 	readed = readFromInputStream(data->inStream, readStart, (size_t)1, 
 			readSize);
 	if(readed <= 0 && inputStreamAtEOF(data->inStream)) return -1;