JeremySkinner/FluentValidation — pull request #20 by StefanBilliet (2013-02-12 20:30:23+00:00)
Title: Comparing two nullable properties

I added these overloads because I needed to compare a nullable property
to another nullable property through lambda.
To be more precise a MinimumValue and a MaximumValue, which could both be null, but otherwise had to have the normal constraints associated with a minimum and maximum value.
I hope this is okay, and thanks for the great work so far :-)