libswscale/swscale.c:1261: error: Uninitialized Value
  The value read from A was never initialized.

libswscale/swscale.c:1261:23: 
1259.             break;
1260.         case PIX_FMT_ABGR:
1261.             dest[0] = hasAlpha ? A : 255;
                            ^
1262.             dest[1] = B >> 22;
1263.             dest[2] = G >> 22;
