From: Sven Verdoolaege <skimo@kotnet.org>
Date: Sun, 2 Dec 2012 16:37:17 +0000 (+0100)
Subject: isl_tab.c: push_union: handle NULL input
X-Git-Tag: isl-0.11~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=b35a6a202fe8bd218af5152420e1dabeb79f10d4;p=platform%2Fupstream%2Fisl.git

isl_tab.c: push_union: handle NULL input

Signed-off-by: Sven Verdoolaege <skimo@kotnet.org>
---

diff --git a/isl_tab.c b/isl_tab.c
index 6089f3a..3fc0367 100644
--- a/isl_tab.c
+++ b/isl_tab.c
@@ -787,6 +787,8 @@ static int push_union(struct isl_tab *tab,
 {
 	struct isl_tab_undo *undo;
 
+	if (!tab)
+		return -1;
 	if (!tab->need_undo)
 		return 0;