avoid duplicated empty help menu in localized applications (patch 1600747)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44798 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/carbon/uma.h

@@ -94,10 +94,17 @@ bool            UMAIsWindowModal( WindowRef inWindow ) ;
 
 void UMAHighlightAndActivateWindow( WindowRef inWindowRef , bool inActivate ) ;
 
+// Retrieves the Help menu handle. Warning: As a side-effect this functions also
+// creates the Help menu if it didn't exist yet.
 OSStatus UMAGetHelpMenu(
   MenuRef *        outHelpMenu,
   MenuItemIndex *  outFirstCustomItemIndex);      /* can be NULL */
 
+// Same as UMAGetHelpMenu, but doesn't create the Help menu if UMAGetHelpMenu hasn't been called yet.
+OSStatus UMAGetHelpMenuDontCreate(
+  MenuRef *        outHelpMenu,
+  MenuItemIndex *  outFirstCustomItemIndex);      /* can be NULL */
+
 // Appearance Drawing
 
 OSStatus UMADrawThemePlacard( const Rect *inRect , ThemeDrawState inState ) ;