Follow-up to r1544721: Make code VisualStudio's code anlysis happy
Follow-up to r1544721: Make code VisualStudio's code anlysis happy

* subversion/libsvn_repos/hooks.c
  (svn_repos__parse_hooks_env): don't touch uninitialized variable

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1544723 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion