consider NOT node as a new scope

ChangeLog

@@ -2,6 +2,7 @@
 =================
 
 --
+    * consider NOT node as a new scope
     * rql checker raise BadRQLQuery for inconsistent orderby on distinct query
     * correctly restore .parent when undoing RemoveNodeOperation
 	

nodes.py

@@ -246,6 +246,10 @@
     def __repr__(self, encoding=None, kwargs=None):
         return 'NOT (%s)' % repr(self.children[0])
     
+    @property
+    def scope(self):
+        return self
+    
     def ored(self, _fromnode=None):
         return self.parent.ored(_fromnode or self)
     def neged(self, _fromnode=None):

stcheck.py

@@ -426,7 +426,7 @@
         node.children[0].accept(self, node)
         
     def visit_not(self, node, scope):
-        node.children[0].accept(self, scope)
+        node.children[0].accept(self, node)
         
     def visit_and(self, node, scope):
         node.children[0].accept(self, scope)