mono/mono — pull request #1214 by esdrubal (2014-08-18 14:36:28+00:00)
Title: Xml Serialization of Base class w/o a parameterless constructor.

Removed validation code that did not allowed serialization of base classes without a parameterless constructor.
Fixes [#6913](https://bugzilla.xamarin.com/show_bug.cgi?id=6913).