Define these methods even when wxUSE_OWNER_DRAWN is turned off for some reason. This allows to avoid ugly tests for !defined(__WXMSW__) || wxUSE_OWNER_DRAWN in the code that just wants to set a bitmap for a menu item. Closes #12664. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@70801 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775