all unittests pass, the special and dependency lookups have their own visitors now, with `self` one can get a reference to the current template and render blocks multiple times.

--HG--
branch : trunk
diff --git a/jinja2/nodes.py b/jinja2/nodes.py
index 69a156f..f87bbb8 100644
--- a/jinja2/nodes.py
+++ b/jinja2/nodes.py
@@ -244,7 +244,7 @@
 
 class CallBlock(Stmt):
     """A node that represents am extended macro call."""
-    fields = ('call', 'body')
+    fields = ('call', 'args', 'defaults', 'body')
 
 
 class Set(Stmt):