libavcodec/4xm.c:217: error: Uninitialized Value
  The value read from temp[_] was never initialized.

libavcodec/4xm.c:217:9: 
215.         z10 = temp[5 + i] - temp[3 + i];
216.         z11 = temp[1 + i] + temp[7 + i];
217.         z12 = temp[1 + i] - temp[7 + i];
             ^
218. 
219.         tmp7  = z11 + z13;
