create stock GDI objects on demand; use const with GDI objects appropriately (patch 1445355)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38765 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/appcmn.cpp

@@ -104,7 +104,6 @@ bool wxAppBase::Initialize(int& argcOrig, wxChar **argvOrig)
 #endif
 
     wxInitializeStockLists();
-    wxInitializeStockObjects();
 
     wxBitmap::InitStandardHandlers();
 
@@ -137,7 +136,7 @@ void wxAppBase::CleanUp()
     // undo everything we did in Initialize() above
     wxBitmap::CleanUpHandlers();
 
-    wxDeleteStockObjects();
+    wxStockGDI::DeleteAll();
 
     wxDeleteStockLists();