git-svn: fix show-ignore

Looks like I broke it in 747fa12cef73b6ca04fffaddaad7326cf546cdea
but never noticed.

Signed-off-by: Eric Wong <normalperson@yhbt.net>
Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/git-svn.perl b/git-svn.perl
index 5377762..1da31fd 100755
--- a/git-svn.perl
+++ b/git-svn.perl
@@ -536,7 +536,7 @@
 	my $repo;
 	$SVN ||= libsvn_connect($SVN_URL);
 	my $r = defined $_revision ? $_revision : $SVN->get_latest_revnum;
-	libsvn_traverse_ignore(\*STDOUT, $SVN->{svn_path}, $r);
+	libsvn_traverse_ignore(\*STDOUT, '', $r);
 }
 
 sub graft_branches {