Follow up to r1618906: Fix assignment to wrong pointer type.

* subversion/libsvn_wc/deprecated.c
  (svn_wc__status2_from_3): Convert from svn_wc_conflict_description2_t
   instead of copying to a pointer of type svn_wc_conflict_description_t.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1618911 13f79535-47bb-0310-9956-ffa450edef68