[PATCH] issue #4185: SVN client silently fails to import an ancestor of external file specified via svn:externals rule with operative revision

[[[
    Fix issue #4185: SVN client silently fails to import an ancestor of external file specified viasvn:externals rule with operative revision.

    * subversion/libsvn_client/externals.c
      (switch_file_external): replace 'url' parameter mistakenly passed to svn_ra_do_switch3() by 'switch_loc->url'.
  ]]]

I've reported issue 4185 after SVN 1.7 release and it has not been fixed until now.

In brief, when I try to import a file, specified viasvn:externals rule with operative revision, such as for example:
'-r1 A/tags/1.0/somefile.txt somefile.txt'

and it so happens, that this file at specified revision has different URL, such as for example:
A/trunk/somefile.txt

that is, 'A/trunk/somefile.txt' is the ancestor of 'A/tags/1.0/somefile.txt somefile.txt' used as a source of 'svn copy' op,
then SVN client fails to import it into a WC.

More details and test script are in the ticket.

All this time, because of this issue I had to stick to SVN client version 1.6.
So I figured may be I could do something about it, since I want to switch over to new SVN version.
Turned out, that the root of the problem was just a typo.

Again, this issue relates to 1.7.x and 1.8.x versions.

Regards, Alex.