Finish issue #1519 - 'svn up doesn't fetch modifications after svn:externals URL has been changed'.
Finish issue #1519 - 'svn up doesn't fetch modifications after
svn:externals URL has been changed'.

* subversion/libsvn_client/externals.c
  (handle_external_item_change): For unchanged externals definitions,
    we now check to see if the thing on disk matches the definition.  If
    not, we re-checkout.

git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@847330 13f79535-47bb-0310-9956-ffa450edef68

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