libavcodec/h264pred.c:144: error: Uninitialized Value
  The value read from t4 was never initialized.

libavcodec/h264pred.c:144:5: 
142.     src[2+1*stride]=
143.     src[1+2*stride]=
144.     src[0+3*stride]=(t3 + t5 + 2*t4 + 2)>>2;
         ^
145.     src[3+1*stride]=
146.     src[2+2*stride]=
