avoid setting negative window size

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63854 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/ribbon/page.cpp

@@ -373,6 +373,8 @@ void wxRibbonPage::SetSizeWithScrollButtonAdjustment(int x, int y, int width, in
             }
         }
     }
+    if (width < 0) width = 0;
+    if (height < 0) height = 0;
     SetSize(x, y, width, height);
 }