don't show warning to the user if session manager detection failed, this is annoying and irrelevant

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@54738 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/utilsgtk.cpp

@@ -290,7 +290,7 @@ static wxString GetSM()
 
     if ( !smc_conn )
     {
-        wxLogWarning(_("Failed to connect to session manager: %s"), smerr);
+        wxLogDebug("Failed to connect to session manager: %s", smerr);
         return wxEmptyString;
     }