From c3c7efd8b1332095ff723230a813539600896e35 Mon Sep 17 00:00:00 2001
From: gepard1984 <gepard1984@54d463be-8e91-2dee-dedb-b68131a5f0ec>
Date: Tue, 14 Feb 2012 23:11:55 +0000
Subject: Fixed skill timers being added even if source has been already
 removed from map and is about to be freed (bug:5277).

git-svn-id: https://rathena.svn.sourceforge.net/svnroot/rathena/trunk@15582 54d463be-8e91-2dee-dedb-b68131a5f0ec
---
 src/map/skill.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/map/skill.c b/src/map/skill.c
index 9bf915917..cdf70d82f 100644
--- a/src/map/skill.c
+++ b/src/map/skill.c
@@ -2914,6 +2914,8 @@ int skill_addtimerskill (struct block_list *src, unsigned int tick, int target,
 	int i;
 	struct unit_data *ud;
 	nullpo_retr(1, src);
+	if (src->prev == NULL)
+		return 0;
 	ud = unit_bl2ud(src);
 	nullpo_retr(1, ud);
 
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