ghci and other test failures on Windows.

[Mike Thomas]

Thanks Simon.

| I just ran the testsuite in lib/IO with an up to date STABLE build on
| Windows, and I don't see the crashes you reported.

Certainly one to ponder on for the future - I get a Windows exception dialog
on all of those cases under both XP and NT 2000 Pro.

| There are some real failures in lib/IO due to the fact that Windows
| doesn't implement Handle locking, probably these should be marked known
| failures for the release.

OK.  I'll leave a build running tonight.

Best of luck with the release.

Mike Thomas.