Fix plistlib to work with dict views.

BROKEN

     test_bsddb test_bsddb3 test_compile test_dumbdbm
     test_importhooks test_iter test_iterlen test_minidom test_mutants
-    test_os test_plistlib
+    test_os

Lib/plat-mac/plistlib.py

@@ -268,8 +268,7 @@ class PlistWriter(DumbXMLWriter):
 
     def writeDict(self, d):
         self.beginElement("dict")
-        items = d.items()
-        items.sort()
+        items = sorted(d.items())
         for key, value in items:
             if not isinstance(key, (str, unicode)):
                 raise TypeError("keys must be strings")