FSFS: Remove a redundant check for a NULL pointer.
FSFS: Remove a redundant check for a NULL pointer.

* subversion/libsvn_fs_fs/revs-txns.c
  (svn_fs_fs__revision_prop): Don't check whether the proplist hash is NULL -
    svn_fs_fs__revision_proplist() will always return an error or a valid
    hash.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@863466 13f79535-47bb-0310-9956-ffa450edef68

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