Updates to memcheck

Corrected and beautified memory (output)
  Fixed a few memory leaks
  Fixed resizing in in wxRadioBox
  Added many wxFAIL and wxASSERT
  Corrected other wxFAIL (removed from ..::Ok())
  Added wxBrush::Set..() functions
  Added CopyOnWrite support in GDI objects (Unshare)
  Disabled all occurences of WXDEBUG_NEW
  made clean, recompiled with mem_chcking on


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@728 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/hash.cpp

@@ -48,11 +48,18 @@ wxHashTable::wxHashTable (int the_key_type, int size)
 
 wxHashTable::~wxHashTable (void)
 {
+  Destroy();
+}
+
+void wxHashTable::Destroy(void)
+{
+  if (!hash_table) return;
   int i;
   for (i = 0; i < n; i++)
     if (hash_table[i])
       delete hash_table[i];
   delete[] hash_table;
+  hash_table = NULL;
 }
 
 bool wxHashTable::Create(int the_key_type, int size)