libswscale/swscale.c:1244: error: Uninitialized Value
  The value read from A was never initialized.

libswscale/swscale.c:1244:23: 
1242.         switch(target) {
1243.         case PIX_FMT_ARGB:
1244.             dest[0] = hasAlpha ? A : 255;
                            ^
1245.             dest[1] = R >> 22;
1246.             dest[2] = G >> 22;
