[1/2] (resend with array adaptation) user32/tests/class.c: Test extra value of standard dialog and edit classes

[Juan Lang]

> Another approach is maybe send the fix as patch1 and the test as patch2?

Personally, I don't like this approach.  It can be useful when the fix
corrects a crash, but otherwise, it may be unclear that the fix is
correct until the tests are accepted.  If the test is acceptable but
the fix is not, then at least the test gets committed.
--Juan