On x11 another control may already have the mouse capture when the menu is

trying to release it's capture, so work around that problem.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33968 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/univ/menu.h

@@ -248,6 +248,9 @@ protected:
     // we don't want to have focus except while selecting from menu
     void GiveAwayFocus();
 
+    // Release the mouse capture if we have it
+    bool ReleaseMouseCapture();
+
     // the array containing extra menu info we need
     wxMenuInfoArray m_menuInfos;