Added logic to copy manage_options from base class so we don't

accidentally modify base class through sub-class.

lib/python/ZClasses/ZClass.py

@@ -267,6 +267,13 @@ class ZClass(OFS.SimpleItem.SimpleItem):
             id, tuple(base_classes),
             PersistentClassDict(title or id))
         c.__ac_permissions__=()
+
+        options=[]
+        for option in c.manage_options:
+            copy={}
+            copy.update(option)
+            options.append(copy)
+        c.manage_options=tuple(options)
         
         # Create the class(/instance) prop sheet *class*
         isheets_class=type(PersistentClass)(