fixing compile under ios

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76520 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
allowing compile under ios, where menus are not available

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76521 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775