Move wxObject and wxFrame forward declarations so that they are accessible to empty wxLogXXX() functions defined in wxUSE_LOG==0 case too. Also take wxFormatString, not wxString, in these functions to avoid overload ambiguities. Closes #11103. git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@61693 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775