Replace wxDeprecatedGUIConstants enum values

src/generic/treectlg.cpp

@@ -1019,7 +1019,7 @@ bool wxGenericTreeCtrl::Create(wxWindow *parent,
     if (!m_hasFont)
         SetOwnFont(attr.font);
 
-    // this is a misnomer: it's called "dotted pen" but uses (default) wxSOLID
+    // this is a misnomer: it's called "dotted pen" but uses (default) wxPENSTYLE_SOLID
     // style because we apparently get performance problems when using dotted
     // pen for drawing in some ports -- but under MSW it seems to work fine
 #ifdef __WXMSW__