Follow-up to r1080034: Explanation in a log is fine, but explanation in code is better.
Follow-up to r1080034: Explanation in a log is fine, but explanation in code
is better.

* subversion/libsvn_repos/log.c
  (get_combined_mergeinfo_changes): Add an explanation for what appears at
   first glance to be bad pool usage.

Suggested by: gstein


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1080236 13f79535-47bb-0310-9956-ffa450edef68

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