Reduce scope

Change-Id: Ifbfd8e4b7a549d0225229a60a12b1b346fc02828

canvas/source/vcl/canvashelper.cxx

@@ -483,7 +483,6 @@ namespace vclcanvas
             tools::OutDevStateKeeper aStateKeeper( mpProtectedOutDev );
 
             const int nTransparency( setupOutDevState( viewState, renderState, FILL_COLOR ) );
-            const int nTransPercent( (nTransparency * 100 + 128) / 255 );  // normal rounding, no truncation here
             ::basegfx::B2DPolyPolygon aB2DPolyPoly(
                 ::basegfx::unotools::b2DPolyPolygonFromXPolyPolygon2D(xPolyPolygon));
             aB2DPolyPoly.setClosed(true); // ensure closed poly, otherwise VCL does not fill
@@ -497,6 +496,7 @@ namespace vclcanvas
             }
             else
             {
+                const int nTransPercent( (nTransparency * 100 + 128) / 255 );  // normal rounding, no truncation here
                 mpOutDev->getOutDev().DrawTransparent( aPolyPoly, (sal_uInt16)nTransPercent );
             }