Forward declare more classes, in particular use tagRECT which can be forward declared, instead of RECT typedef in public headers. Also include more header in #ifndef WX_PRECOMP case. See #11595. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63272 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775