Simplify use of fetch_repos_info().  The immediate effect is marginal; the benefit will come when a forthcoming patch makes more use of the function.
Simplify use of fetch_repos_info().  The immediate effect is marginal; the
benefit will come when a forthcoming patch makes more use of the function.

* subversion/libsvn_wc/wc_db.c
  (fetch_repos_info): Accept a null input, and exit quickly if no outputs
    are wanted, so the caller does not have to check those things.
  (svn_wc__db_scan_base_repos, svn_wc__db_scan_addition): Simplify by
    omitting those checks.
  (svn_wc__db_read_children_info): Remove an unused variable. This doesn't
    depend on the above change.

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