libavcodec/vc1_parser.c:203: error: Uninitialized Value
  The value read from b was never initialized.

libavcodec/vc1_parser.c:203:71: 
201.                     pic_found = 1;
202.                 }
203.                 else if (pic_found && b != (VC1_CODE_FIELD & 0xFF) && b != (VC1_CODE_SLICE & 0xFF)) {
                                                                           ^
204.                     next = i - 4;
205.                     pic_found = b == (VC1_CODE_FRAME & 0xFF);
