From 8f2ad64f3de00116dfb85d6b7675ade03b4fabf2 Mon Sep 17 00:00:00 2001
From: Ton Roosendaal <ton@blender.org>
Date: Thu, 16 Nov 2006 20:23:29 +0000
Subject: [PATCH] Bugfix: sequencer scrubbing crashed in cache limitor, missing
 NULL check.

---
 source/blender/src/sequence.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/source/blender/src/sequence.c b/source/blender/src/sequence.c
index 090d821a342..6dabe9f2fec 100644
--- a/source/blender/src/sequence.c
+++ b/source/blender/src/sequence.c
@@ -1141,7 +1141,8 @@ ImBuf *give_ibuf_seq(int rectx, int recty, int cfra, int chanshown)
 		return 0;
 	}
 
-	IMB_cache_limiter_unref(seqfirst->curelem->ibuf);
+	if(seqfirst->curelem->ibuf)
+		IMB_cache_limiter_unref(seqfirst->curelem->ibuf);
 
 	return seqfirst->curelem->ibuf;