Simplify a couple of functions to directly use a wc_db parameter, rather than the superfluous context.
Simplify a couple of functions to directly use a wc_db parameter, rather than
the superfluous context.

* subversion/libsvn_wc/adm_ops.c
  (add_from_disk, check_can_add_node): Replace the svn_wc_context_t param with
    svn_wc__db_t.
  (svn_wc_add4, svn_wc_add_from_disk): Update callers.

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