merged 2.4 branch into the trunk

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@18040 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/mimecmn.cpp

@@ -426,7 +426,7 @@ bool wxFileType::SetDefaultIcon(const wxString& cmd, int index)
     // VZ: should we do this?
     // chris elliott : only makes sense in MS windows
     if ( sTmp.empty() )
-        GetOpenCommand(&sTmp, wxFileType::MessageParameters("", ""));
+        GetOpenCommand(&sTmp, wxFileType::MessageParameters(wxT(""), wxT("")));
 #endif
     wxCHECK_MSG( !sTmp.empty(), FALSE, _T("need the icon file") );