From d21926e213c1da59d1327d0f7e9e2b4756ca2654 Mon Sep 17 00:00:00 2001
From: Pieter de Bie <pdebie@ai.rug.nl>
Date: Thu, 28 Aug 2008 02:55:15 +0200
Subject: [PATCH] Don't draw lanes if we don't have any parents anymore

---
 PBGitGrapher.m | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/PBGitGrapher.m b/PBGitGrapher.m
index 08324eb..a264f3b 100644
--- a/PBGitGrapher.m
+++ b/PBGitGrapher.m
@@ -126,7 +126,11 @@
 			previous.numColumns = [currentLanes count] - 1;
 		else
 			previous.numColumns = [currentLanes count];
-		currentLane.sha = [commit.parents objectAtIndex:0];
+
+		if ([commit.parents count] > 0 && ![[commit.parents objectAtIndex:0] isEqualToString:@""])
+			currentLane.sha = [commit.parents objectAtIndex:0];
+		else
+			[currentLanes removeObject:currentLane];
 
 		previousLanes = currentLanes;
 		[cellsInfo addObject: previous];