added HasHandlerForPath() (modified patch 1514524)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@40281 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/filesys.h

@@ -188,6 +188,9 @@ public:
     // In fact, this class is only front-end to the FS handlers :-)
     static void AddHandler(wxFileSystemHandler *handler);
 
+    // Returns true if there is a handler which can open the given location.
+    static bool HasHandlerForPath(const wxString& location);
+
     // remove all items from the m_Handlers list
     static void CleanUpHandlers();