Use a more appropriate QgsRect modify function

git-svn-id: http://svn.osgeo.org/qgis/trunk@5289 c8812cc2-4d05-0410-92ff-de0c093fc19c

Author: g_j_m

src/gui/qgsmapcanvas.cpp

@@ -515,7 +515,7 @@ void QgsMapCanvas::zoomToSelected()
     {
       // Expand rect to give a bit of space around the selected
       // objects so as to keep them clear of the map boundaries
-      rect.expand(1.1);
+      rect.scale(1.1);
       setExtent(rect);
       refresh();
       return;