Resolves: fdo#82552 we only check pAlphaW on one branch

Change-Id: Ib2c5a0d751050af77f267edbb7a5a0fe57494622
(cherry picked from commit fee95be5b637dbfbdbe78426c02240b1dc90e1f2)
Reviewed-on: https://gerrit.libreoffice.org/11404
Reviewed-by: Thomas Arnhold <thomas@arnhold.org>
Tested-by: Thomas Arnhold <thomas@arnhold.org>
diff --git a/vcl/source/outdev/bitmap.cxx b/vcl/source/outdev/bitmap.cxx
index 56c5033..cd555f7 100644
--- a/vcl/source/outdev/bitmap.cxx
+++ b/vcl/source/outdev/bitmap.cxx
@@ -1249,7 +1249,7 @@ Bitmap OutputDevice::BlendBitmapWithAlpha(
        BitmapReadAccess*   pB = aBmp.AcquireReadAccess();
        BitmapWriteAccess*  pW = aDither.AcquireWriteAccess();

        if( pB && pP && pA && pW && pAlphaW )
        if (pB && pP && pA && pW && pAlphaW)
        {
            int nOutY;

@@ -1286,7 +1286,7 @@ Bitmap OutputDevice::BlendBitmapWithAlpha(
    else
    {
        BitmapWriteAccess*  pB = aBmp.AcquireWriteAccess();
        if( pP && pA && pB )
        if (pB && pP && pA && pAlphaW)
        {
            for( nY = 0; nY < nDstHeight; nY++ )
            {