Introduce a wc_db-internal function, so that internal callers don't have to provide the various outer wrapper structs and args.
Introduce a wc_db-internal function, so that internal callers don't have to
provide the various outer wrapper structs and args.

* subversion/libsvn_wc/wc_db.c
  (read_url): New.
  (svn_wc__db_read_url): Use the internal function.
  (has_switched_subtrees): Remove now-unused DB param, and update call to above.
  (svn_wc__db_hash_switched_subtrees, svn_wc__db_revision_status):
    Update caller.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1081461 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion