libavcodec/h264pred.c:256: error: Uninitialized Value
  The value read from t1 was never initialized.

libavcodec/h264pred.c:256:5: 
254.     src[2+2*stride]=(t0 + t1 + 1)>>1;
255.     src[2+0*stride]=
256.     src[3+2*stride]=(t1 + t2 + 1)>>1;
         ^
257.     src[3+0*stride]=(t2 + t3 + 1)>>1;
258.     src[0+1*stride]=
