[cvs-nhc98] Reinstate the fast I/O implementation. Bugfixes:

Malcolm Wallace malcolm@sparud.net
Tue, 30 Jan 2001 17:04:55 +0100 (CET) 

malcolm: Tue Jan 30 17:04:55 CET 2001

Update of /usr/src/master/nhc/src/compiler98
In directory hinken:/tmp/cvs-serv26360

Modified Files:
	TypeUnify.hs 
Log Message:
Improve error message for type variable occurrence-check failure.