Added Delete member to wxStringHashTable in order to implement

wxHelpProvider::RemoveHelp, which is now called from ~wxWindowBase.
Without cleaning up the hash tables, reused window addresses will cause
the CS help to fail rather comically over time.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@15754 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/hash.h

@@ -127,6 +127,9 @@ public:
     // and the wasFound is set to FALSE if not NULL
     wxString Get(long key, bool *wasFound = NULL) const;
 
+    // remove the item, returning TRUE if the item was found and deleted
+    bool Delete(long key) const;
+
     // clean up
     void Destroy();