fixed a bug in the compiler

--HG--
branch : trunk
diff --git a/jinja2/environment.py b/jinja2/environment.py
index 6ee6a95..417a035 100644
--- a/jinja2/environment.py
+++ b/jinja2/environment.py
@@ -145,5 +145,4 @@
         return u''.join(self.stream(*args, **kwargs))
 
     def stream(self, *args, **kwargs):
-        context = dict(*args, **kwargs)
-        return self.root_render_func(context)
+        return self.root_render_func(dict(*args, **kwargs))