fixing decoding of AlanKay-245.asf

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@4219 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

libavcodec/h263.c

@@ -5809,7 +5809,7 @@ static int decode_vop_header(MpegEncContext *s, GetBitContext *gb){
 
     check_marker(gb, "before time_increment");
 
-    if(s->time_increment_bits==0){
+    if(s->time_increment_bits==0 || !(show_bits(gb, s->time_increment_bits+1)&1)){
         av_log(s->avctx, AV_LOG_ERROR, "hmm, seems the headers are not complete, trying to guess time_increment_bits\n");
 
         for(s->time_increment_bits=1 ;s->time_increment_bits<16; s->time_increment_bits++){