libavcodec/vp8dsp.c:150: error: Uninitialized Value
  The value read from q0 was never initialized.

libavcodec/vp8dsp.c:150:14: 
148. {
149.     LOAD_PIXELS
150.     return 2*FFABS(p0-q0) + (FFABS(p1-q1) >> 1) <= flim;
                  ^
151. }
152. 
