declare wxQsort in vector.h as well as utils.h to work around circular header dependency mess

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@73058 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/vector.h

@@ -36,6 +36,15 @@ inline void wxVectorSort(wxVector<T>& v)
 #include <new> // for placement new
 #include "wx/afterstd.h"
 
+// wxQsort is declared in wx/utils.h, but can't include that file here,
+// it indirectly includes this file. Just lovely...
+typedef int (*wxSortCallback)(const void* pItem1,
+                              const void* pItem2,
+                              const void* user_data);
+WXDLLIMPEXP_BASE void wxQsort(void* pbase, size_t total_elems,
+                              size_t size, wxSortCallback cmp,
+                              const void* user_data);
+
 namespace wxPrivate
 {