From ce837c9de5d67919437e1c05789b23c3aca95d4c Mon Sep 17 00:00:00 2001
From: Stefan Haller <stefan@haller-berlin.de>
Date: Thu, 4 Oct 2012 22:50:16 +0200
Subject: [PATCH] gitk: Fix error message when clicking on a connecting line

When clicking on the line that connects two commit nodes, gitk
would bring up an error dialog saying "can't read "cflist_top":
no such variable".

This fixes a regression that was introduced with b967135 ("gitk:
Synchronize highlighting in file view when scrolling diff").

Signed-off-by: Stefan Haller <stefan@haller-berlin.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
---
 gitk | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/gitk b/gitk
index 54cffde721..a569c0d4b8 100755
--- a/gitk
+++ b/gitk
@@ -7970,6 +7970,8 @@ proc changediffdisp {} {
 proc highlightfile {cline} {
     global cflist cflist_top
 
+    if {![info exists cflist_top]} return
+
     $cflist tag remove highlight $cflist_top.0 "$cflist_top.0 lineend"
     $cflist tag add highlight $cline.0 "$cline.0 lineend"
     $cflist see $cline.0