1. some fixes for wxSortedArrayString

2. wxChoice understands wxCB_SORT under GTK


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4135 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/string.h

@@ -912,8 +912,9 @@ public:
     // sensitive (default). Returns index of the first item matched or
     // wxNOT_FOUND
   int  Index (const wxChar *sz, bool bCase = TRUE, bool bFromEnd = FALSE) const;
-    // add new element at the end
-  void Add(const wxString& str);
+    // add new element at the end (if the array is not sorted), return its
+    // index
+  size_t Add(const wxString& str);
     // add new element at given position
   void Insert(const wxString& str, size_t uiIndex);
     // remove first item matching this value