ofz#7359 Integer overflow

Change-Id: I9c857f7fb8fbfceb9e061fd0bc1f0b0b63b35524
Reviewed-on: https://gerrit.libreoffice.org/52401Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

emfio/source/reader/emfreader.cxx

@@ -1482,7 +1482,8 @@ namespace emfio
                         else
                         {
                             Bitmap aBitmap;
-                            tools::Rectangle aRect( Point( xDest, yDest ), Size( cxDest, cyDest ) );
+                            tools::Rectangle aRect(xDest, yDest);
+                            aRect.SaturatingSetSize(Size(cxDest, cyDest));
 
                             sal_uInt32 nSize = cbBmiSrc + cbBitsSrc + 14;
                             if ( nSize <= ( mnEndPos - mnStartPos ) )