[IronPython] FIX: Defining classes interactively

[Curt Hagenlocher]

When using the interactive interpreter to define a class, an
exception is thrown.  The simplest code that reproduces this is

>>> class foo:
...	pass
...

This results in
System.Reflection.TargetException: Non-static field requires a target.

This problem can be fixed by modifying line 124 in Objects/module.cs
to read "return fi.GetValue(this);" -- that is, changing the 
argument from null to this.

I don't see any negative ramifications to making the change.

--
Curt Hagenlocher
curt at hagenlocher.org