pas2js: hide $shared in sets

git-svn-id: trunk@40143 -

utils/pas2js/dist/rtl.js

@@ -853,7 +853,12 @@ var rtl = {
   },
 
   refSet: function(s){
-    s.$shared = true;
+    Object.defineProperty(s, '$shared', {
+      enumerable: false,
+      configurable: true,
+      writable: true,
+      value: true
+    });
     return s;
   },