libswscale/swscale.c:1165: error: Uninitialized Value
  The value read from A2 was never initialized.

libswscale/swscale.c:1165:5: 
1163.     int i;
1164. 
1165.     YSCALE_YUV_2_ANYRGB_C(YSCALE_YUV_2_RGB2_C)
          ^
1166. }
1167. 
