Fix compilation on OS/400.
Fix compilation on OS/400.

Patch by: Mark Phippard <MarkP@softlanding.com>

* subversion/svnserve/main.c
  (run_mode): Remove comma after last enum.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion