* subversion/libsvn_repos/reporter.c (update_entry): Flesh out comment   with descriptions of when the parameters may be NULL.
* subversion/libsvn_repos/reporter.c (update_entry): Flesh out comment
  with descriptions of when the parameters may be NULL.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@855437 13f79535-47bb-0310-9956-ffa450edef68

wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion