libavcodec/vp56.c:175: error: Uninitialized Value
  The value read from type[_] was never initialized.

libavcodec/vp56.c:175:13: 
173.     for (b=0; b<4; b++) {
174.         switch (type[b]) {
175.             case VP56_MB_INTER_NOVEC_PF:
                 ^
176.                 s->mv[b] = (vp56_mv_t) {0,0};
177.                 break;
