Related tdf#101467: fix a leak with pSalMask (vcl/bitmapex)

+ initialize pSalBmp+pSalMask to nullptr

Change-Id: I320e9cf98ef8224e98303bec1e58f59dc5b1ad4e
Reviewed-on: https://gerrit.libreoffice.org/41097Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

vcl/source/gdi/bitmapex.cxx

@@ -788,14 +788,15 @@ bool BitmapEx::Create( const css::uno::Reference< css::rendering::XBitmapCanvas
         }
     }
 
-    SalBitmap* pSalBmp, *pSalMask;
+    SalBitmap* pSalBmp = nullptr;
+    SalBitmap* pSalMask = nullptr;
 
     pSalBmp = ImplGetSVData()->mpDefInst->CreateSalBitmap();
-    pSalMask = ImplGetSVData()->mpDefInst->CreateSalBitmap();
 
     Size aLocalSize(rSize);
     if( pSalBmp->Create( xBitmapCanvas, aLocalSize ) )
     {
+        pSalMask = ImplGetSVData()->mpDefInst->CreateSalBitmap();
         if ( pSalMask->Create( xBitmapCanvas, aLocalSize, true ) )
         {
             *this = BitmapEx(Bitmap(pSalBmp), Bitmap(pSalMask) );
@@ -803,6 +804,7 @@ bool BitmapEx::Create( const css::uno::Reference< css::rendering::XBitmapCanvas
         }
         else
         {
+            delete pSalMask;
             *this = BitmapEx(Bitmap(pSalBmp));
             return true;
         }