* resync without endless loop

Originally committed as revision 849 to svn://svn.ffmpeg.org/ffmpeg/trunk

libavcodec/mpegaudiodec.c

@@ -2399,6 +2399,8 @@ static int decode_frame(AVCodecContext * avctx,
             if (len == 0) {
 		/* frame too long: resync */
                 s->frame_size = 0;
+		memcpy(s->inbuf, s->inbuf + 1, s->inbuf_ptr - s->inbuf - 1);
+		s->inbuf_ptr--;
             } else {
                 UINT8 *p, *pend;
                 UINT32 header1;