If an item is hidden, don't check it for overflows.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@54568 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/gbsizer.cpp

@@ -580,7 +580,7 @@ void wxGridBagSizer::AdjustForOverflow()
         {
             wxGBPosition pos(row,col);
             wxGBSizerItem* item = FindItemAtPosition(pos);
-            if ( !item )
+            if ( !item || !item->ShouldAccountFor() )
                 continue;
 
             int endrow, endcol;
@@ -623,7 +623,7 @@ void wxGridBagSizer::AdjustForOverflow()
         {
             wxGBPosition pos(row,col);
             wxGBSizerItem* item = FindItemAtPosition(pos);
-            if ( !item )
+            if ( !item || !item->ShouldAccountFor() )
                 continue;
 
             int endrow, endcol;