Resolve a strange error that somehow occurred only on some specific powerpc
architectures. The real problem is that we didn't properly detect the end of
the variable argument list, so it can fail on all architectures.

Found by: astieger

* subversion/svn/status-cmd.c
  (svn_cl__status): Add missing end of warning status values marker.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1543145 13f79535-47bb-0310-9956-ffa450edef68