Remove "isPopup" parameter from DoSendMenuOpenCloseEvent() in wxMSW.

This parameter is redundant, we can find out whether a menu is a popup one or
not from the menu itself, assuming that we always have a valid wxMenu pointer
for popup menus events, which really should be the case (we may not have one
for the events from system menus).

This allows to handle popup menu events case in the base class version of
MSWFindMenuFromHMENU() which will allow to reuse it from places other than
DoSendMenuOpenCloseEvent() without code duplication now.

There should be no changes to the behaviour, this is just a simplification.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@78227 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/frame.h

@@ -108,7 +108,7 @@ public:
     virtual WXHMENU MSWGetActiveMenu() const { return m_hMenu; }
 
     virtual bool HandleMenuSelect(WXWORD nItem, WXWORD nFlags, WXHMENU hMenu);
-    virtual bool DoSendMenuOpenCloseEvent(wxEventType evtType, wxMenu* menu, bool popup);
+    virtual bool DoSendMenuOpenCloseEvent(wxEventType evtType, wxMenu* menu);
 
     // Look up the menu in the menu bar.
     virtual wxMenu* MSWFindMenuFromHMENU(WXHMENU hMenu);