libavcodec/fmvc.c:180: error: Uninitialized Value
  The value read from opcode was never initialized.

libavcodec/fmvc.c:180:13: 
178.                 break;
179.             }
180.             len = opcode & 0x1F;
                 ^
181.             bytestream2_skip(gb, 1);
182.             if (!len) {
