1. wxPaintDC reuse now seems to actually work instead of leading to mysterious

bugs (but I still don't know why should we have it at all)
2. wxMenuItem initializes m_bChecked variable - thanks Purify
3. don't try to delete the brush which couldn't be created in app.cpp


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2724 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/menuitem.cpp

@@ -105,6 +105,7 @@ wxMenuItem::wxMenuItem(wxMenu *pParentMenu, int id,
     m_pParentMenu = pParentMenu;
     m_pSubMenu    = pSubMenu;
     m_bEnabled    = TRUE;
+    m_bChecked    = FALSE;
     m_idItem      = id;
 }