Merge r1616131 from trunk:

 * r1616131
   Make sure all members of the repos layer notify struct are valid by no
   longer re-using a single instance.
   Justification:
     This resolves segfaults in bindings like javahil that use all members
     of the struct, instead of only those needed for output (as svnadmin).
   Votes:
     +1: rhuijben, stsp, brane


git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/1.8.x@1616396 13f79535-47bb-0310-9956-ffa450edef68