Use Bind() instead of Connect() in wxWidgets code

Use more modern function which allows to avoid wxXXXEventHandler()
macros use.

No real changes.

src/common/treebase.cpp

@@ -179,7 +179,7 @@ wxTreeCtrlBase::wxTreeCtrlBase()
     // quick DoGetBestSize calculation
     m_quickBestSize = true;
 
-    Connect(wxEVT_CHAR_HOOK, wxKeyEventHandler(wxTreeCtrlBase::OnCharHook));
+    Bind(wxEVT_CHAR_HOOK, &wxTreeCtrlBase::OnCharHook, this);
 }
 
 wxTreeCtrlBase::~wxTreeCtrlBase()