Follow-up to r27898, fix uninitialized variable warning.
Follow-up to r27898, fix uninitialized variable warning.

* subversion/libsvn_client/merge.c
  (do_merge): Use 'sources_related' argument, not merge_cmd_baton_t
    'sources_related' field, which hasn't been initialized yet.

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