libavcodec/h264pred.c:908: error: Uninitialized Value
  The value read from l7 was never initialized.

libavcodec/h264pred.c:908:5: 
906.     PREDICT_8x8_LOAD_TOPLEFT;
907.     SRC(0,7)= (l6 + l7 + 1) >> 1;
908.     SRC(1,7)= (l5 + 2*l6 + l7 + 2) >> 2;
         ^
909.     SRC(0,6)=SRC(2,7)= (l5 + l6 + 1) >> 1;
910.     SRC(1,6)=SRC(3,7)= (l4 + 2*l5 + l6 + 2) >> 2;
