minor fix to wxFileName::MakeRelativeTo(), removed broken and misleading IsWild() method, added IsDir() one

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@14948 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/filename.h

@@ -296,9 +296,6 @@ public:
     // is the char a path separator for this format?
     static bool IsPathSeparator(wxChar ch, wxPathFormat format = wxPATH_NATIVE);
 
-    // FIXME: what exactly does this do?
-    bool IsWild( wxPathFormat format = wxPATH_NATIVE );
-
     // Dir accessors
     void AppendDir( const wxString &dir );
     void PrependDir( const wxString &dir );
@@ -344,6 +341,9 @@ public:
     // Return the long form of the path (returns identity on non-Windows platforms)
     wxString GetLongPath() const;
 
+    // Is this a file or directory (not necessarily an existing one)
+    bool IsDir() const { return m_name.empty() && m_ext.empty(); }
+
     // various helpers
 
         // get the canonical path format for this platform