[cvs-nhc98] Correct transformation of pattern bindings in do.

olaf: Fri Mar 16 20:42:07 CET 2001 Update of /usr/src/master/nhc/src/compiler98 In directory hinken:/tmp/cvs-serv22166/src/compiler98 Modified Files: DbgDataTrans.hs Log Message: Correct transformation of pattern bindings in do. Function dRemoveDo still assumed pre-Haskell98 translation that uses Monad.zero. Changed it to correctly use fail "...". Confusingly token fail is called t_zero, probably because t_fail is used by the tracer for different purposes.