git-svn: set svn.authorsfile earlier when cloning

If a clone errors out because of a missing author, or user interrupt,
this allows `git svn fetch` to resume seamlessly, rather than forcing
the user to re-provide the path to the authors file.

[ew: shortened subject]
Signed-off-by: Alex Vandiver <alex@chmrr.net>
Acked-by: Eric Wong <normalperson@yhbt.net>

git-svn.perl

@@ -394,9 +394,9 @@ sub cmd_clone {
 	$path = basename($url) if !defined $path || !length $path;
 	my $authors_absolute = $_authors ? File::Spec->rel2abs($_authors) : "";
 	cmd_init($url, $path);
-	Git::SVN::fetch_all($Git::SVN::default_repo_id);
 	command_oneline('config', 'svn.authorsfile', $authors_absolute)
 	    if $_authors;
+	Git::SVN::fetch_all($Git::SVN::default_repo_id);
 }
 
 sub cmd_init {