Follow up to r1330410: Fix more potential file descriptor leaks.
Follow up to r1330410: Fix more potential file descriptor leaks.

* subversion/libsvn_repos/hooks.c
  (run_hook_cmd): Close all open file descriptors even if svn_io_run_cmd3()
   returns an error. Check whether cmd_proc.err was opened before closing
   it, for safety.

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