[cvs-nhc98] In traced IO library, use newtype'd Handles directly in FF

malcolm: Thu Mar 14 16:50:04 CET 2002 Update of /usr/src/master/nhc/src/prelude/IO In directory hinken:/tmp/cvs-serv28400 Modified Files: HFileSize.hs HFlush.hs HGetBuffering.hs HGetFileName.hs HGetPosn.hs HIsEOF.hs HSeek.hs HSetBuffering.hs HSetPosn.hs IoeGetFileName.hs Makefile Log Message: In traced IO library, use newtype'd Handles directly in FFI calls, rather than explicitly matching on the constructor.