Better name for wxXmlResource::GetDirection() argument.

'dir' is not very descriptive (of course it's a direction!), it's better
to include 'default' in the name to indicate this is the default value
to use in absence of a specific one.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@74788 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/xrc/xmlres.h

@@ -540,7 +540,7 @@ public:
                          wxWindow *windowToUse = NULL);
 
     // Gets a direction, complains if the value is invalid.
-    wxDirection GetDirection(const wxString& param, wxDirection dir = wxLEFT);
+    wxDirection GetDirection(const wxString& param, wxDirection dirDefault = wxLEFT);
 
     // Gets a bitmap.
     wxBitmap GetBitmap(const wxString& param = wxT("bitmap"),