[project @ 2001-06-01 13:06:01 by sewardj]
More fixups to make the new IO lib work on mingw. * Outlaw changing the file position on a text-mode file. After consideration of the mingw translation semantics I cannot see how to make a correct implementation. * Add a field to Handle__ to say whether or not the handle is in binary mode. * Restrict seek operations on Handles to those in binary mode. * Export hSetBinaryMode from IO.lhs.