Deprecate wxPathExists, make wxDirExists used everywhere, minor source cleaning.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@33350 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/archive/archivetest.cpp

@@ -912,7 +912,7 @@ void ArchiveTestCase<ClassFactoryT>::VerifyDir(wxString& path,
             name = m_factory->GetInternalName(
                     path.substr(rootlen, wxString::npos));
 
-            bool isDir = wxPathExists(path);
+            bool isDir = wxDirExists(path);
             if (isDir)
                 name += _T("/");