really fix warning about implicitly converting 0 and 1 to size_t -- use explicit cast to size_type

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38642 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/hashmap.h

@@ -640,7 +640,10 @@ public: \
  \
     /* count() == 0 | 1 */ \
     size_type count( const const_key_type& key ) \
-        { return GetNode( key ) ? 1u : 0u; } \
+    { \
+        /* explicit cast needed to suppress CodeWarrior warnings */ \
+        return (size_type)(GetNode( key ) ? 1 : 0); \
+    } \
 }
 
 #endif // !wxUSE_STL || !defined(HAVE_STL_HASH_MAP)