More helpful description for register_class args check

[thijs]

When I try to start the attached server it throws:

Traceback (most recent call last):
  File "server.py", line 55, in <module>
    register_class(User, 'org.pyamf.User')
  File "/pyamf/trunk/pyamf/__init__.py", line 644, in register_class
    raise TypeError("pyamf doesn't support required init arguments")
TypeError: pyamf doesn't support required init arguments

but this confuses me as a user ;) njoyce suggested a more helpful description like:

TypeError: in __init__(self, bla, blah, blarg) of the User class etc

[mvtellingen]

Fixed in the register_class-args-check-334 branch. The exception is now:

TypeError: __init__ doesn't support additional arguments: Foo.__init__(self, bar, valid=1)

[nick]

Use self.assertTrue(bla) instead of assert something, else and then its good to be merged.

[nick]

Merged in r1593.