added missing wxUSE_XXX checks

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@47322 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/btncmn.cpp

@@ -23,6 +23,8 @@
     #pragma hdrstop
 #endif
 
+#if wxUSE_BUTTON
+
 #ifndef WX_PRECOMP
     #include "wx/button.h"
     #include "wx/toplevel.h"
@@ -42,3 +44,4 @@ wxWindow *wxButtonBase::SetDefault()
     return tlw->SetDefaultItem(this);
 }
 
+#endif // wxUSE_BUTTON