[project @ 2000-06-23 13:13:10 by sewardj]

markHugsObjects() and lookupSection(): don't use debugging versions
of macros module(), name(), tycon(), etc, even when debugging.
Also, in lookupSection(), return immediately when not in combined mode.
Together, these dramatically reduce the cost of GC in Hugs (by about
a factor of 15 for nofib/real/anna).