10l typo

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@4053 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/parser.c

@@ -330,7 +330,7 @@ static void mpegvideo_extract_headers(AVCodecParserContext *s,
                         frame_rate_ext_n = (buf[5] >> 5) & 3;
                         frame_rate_ext_d = (buf[5] & 0x1f);
                         pc->progressive_sequence = buf[1] & (1 << 3);
-                        avctx->has_b_frames= buf[5] >> 7;
+                        avctx->has_b_frames= !(buf[5] >> 7);
 
                         pc->width  |=(horiz_size_ext << 12);
                         pc->height |=( vert_size_ext << 12);