libavcodec/h264pred.c:341: error: Uninitialized Value
  The value read from t4 was never initialized.

libavcodec/h264pred.c:341:5: 
339.     src[1+2*stride]=(t2 + t3 + 1)>>1;
340.     src[3+0*stride]=
341.     src[2+2*stride]=(t3 + t4 + 1)>>1;
         ^
342.     src[0+1*stride]=(t0 + 2*t1 + t2 + 2)>>2;
343.     src[1+1*stride]=
