[PATCH] issue #3653: svn update should not output svn:external fetches if they have not been updated

[[[
(Partial) fix issue #3653: svn update should not output svn:external
fetches if they have not been updated

* subversion/svn/notify.c (notify)
   Removed: "Fetching external item into path/to/item" message on 'svn
update'
   Message is still printed for 'svn checkout' and 'svn export'
]]]

Hi,

Here's a small patch for making svn up a little less verbose when
handling svn:externals.
Thanks,

tijn