use kind, not id, of a menu item to test whether it's a separator: this allows having separators with ids other than wxID_SEPARATOR in case it's useful to distinguish between them (patch 1929039)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53056 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/framecmn.cpp

@@ -360,7 +360,7 @@ bool wxFrameBase::ShowMenuHelp(int menuId)
     if ( menuId != wxID_SEPARATOR && menuId != -3 /* wxID_TITLE */ )
     {
         const wxMenuItem * const item = FindItemInMenuBar(menuId);
-        if ( item )
+        if ( item && !item->IsSeparator() )
             helpString = item->GetHelp();
 
         // notice that it's ok if we don't find the item because it might