slodge/MvvmCross — pull request #348 by Costo (2013-07-10 18:24:17+00:00)
Title: Avoid NullReferenceException when casting null to value type

Hi Stuart,
Here is a pull request for a problem I often encounter with MvvmCross.
Bindings on `Nullable<>` fail when trying to assign `null`. This is due to the fact that casting `null` to a value type will throw a `NullReferenceException`.