Fix compiler.ast.flatten function so that it works on lists.
diff --git a/Lib/compiler/ast.py b/Lib/compiler/ast.py
index 6b78fdd..accda45 100644
--- a/Lib/compiler/ast.py
+++ b/Lib/compiler/ast.py
@@ -4,9 +4,9 @@
 """
 from consts import CO_VARARGS, CO_VARKEYWORDS
 
-def flatten(list):
+def flatten(seq):
     l = []
-    for elt in list:
+    for elt in seq:
         t = type(elt)
         if t is tuple or t is list:
             for elt2 in flatten(elt):
@@ -15,8 +15,8 @@
             l.append(elt)
     return l
 
-def flatten_nodes(list):
-    return [n for n in flatten(list) if isinstance(n, Node)]
+def flatten_nodes(seq):
+    return [n for n in flatten(seq) if isinstance(n, Node)]
 
 nodes = {}