[Xcb] [PATCH 1/2: proto] Rename the ExprType "parent" attribute to "parents".

[Alex Plotnick]

This is fallout from commit 76ca2c0b1527541be59c344118c538ba055ad9d8,
which renamed the *parent parameter of ExprType.__init__, but failed
to rename the instance attribute to which it was assigned.
---
 xcbgen/xtypes.py |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/xcbgen/xtypes.py b/xcbgen/xtypes.py
index 14c318a..c789158 100644
--- a/xcbgen/xtypes.py
+++ b/xcbgen/xtypes.py
@@ -221,11 +221,11 @@ class ExprType(Type):
     Public fields added:
     expr is an Expression object containing the value of the field.
     '''
-    def __init__(self, elt, member, *parent):
+    def __init__(self, elt, member, *parents):
         Type.__init__(self, member.name)
         self.is_expr = True
         self.member = member
-        self.parent = parent
+        self.parents = parents
 
         self.expr = Expression(list(elt)[0], self)
 
-- 
1.7.9.2