Duplicate keyword arguments now disallowed. Based on contribution from

Daniel Earwicker.


[SVN r31671]

libs/parameter

@@ -1 +1 @@
-Subproject commit 5c79ce742c35966e122ae961f8c77f179d43c9c6
+Subproject commit 3a5cabb94f022b272da56c16d9134b76e689c9a6