No real changes, just make wxMenuBar::MSWGetMenu() const.

There is no reason not to.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78246 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/menu.h

@@ -235,8 +235,8 @@ public:
     void Refresh( bool eraseBackground,
                           const wxRect *rect = (const wxRect *) NULL ) { wxWindow::Refresh(eraseBackground, rect); }
 
-    // get the menu with given handle (recursively)
-    wxMenu* MSWGetMenu(WXHMENU hMenu);
+    // Get a top level or sub menu with given handle (recursively).
+    wxMenu* MSWGetMenu(WXHMENU hMenu) const;
 
 protected:
     // common part of all ctors

src/msw/menu.cpp

@@ -1629,8 +1629,7 @@ void wxMenuBar::Detach()
     wxMenuBarBase::Detach();
 }
 
-// get the menu with given handle (recursively)
-wxMenu* wxMenuBar::MSWGetMenu(WXHMENU hMenu)
+wxMenu* wxMenuBar::MSWGetMenu(WXHMENU hMenu) const
 {
     // If we're called with the handle of the menu bar itself, we can return
     // immediately as it certainly can't be the handle of one of our menus.