libavcodec/vp9dsp.c:1627: error: Uninitialized Value
  The value read from q6 was never initialized.

libavcodec/vp9dsp.c:1627:13: 
1625.             dst[strideb * +5] = (p1 + p0 + q0 + q1 + q2 + q3 + q4 + q5 * 2 +
1626.                                  q6 + q7 + q7 + q7 + q7 + q7 + q7 + 8) >> 4;
1627.             dst[strideb * +6] = (p0 + q0 + q1 + q2 + q3 + q4 + q5 + q6 * 2 +
                  ^
1628.                                  q7 + q7 + q7 + q7 + q7 + q7 + q7 + 8) >> 4;
1629.         } else if (wd >= 8 && flat8in) {
