[cvs-nhc98] Change 'foldr (++) []' to 'concat'.

malcolm: Mon Jun 3 17:04:52 CEST 2002 Update of /usr/src/master/nhc/src/compiler98 In directory hinken:/tmp/cvs-serv22498 Modified Files: SccModule.hs Log Message: Change 'foldr (++) []' to 'concat'.