From: Bart De Schuymer <bdschuym@pandora.be>
Date: Sun, 14 Nov 2004 13:22:29 +0000 (+0000)
Subject: prevent segfault
X-Git-Tag: submit/upstream/20140618.160417~197
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=620443a95a3fa0224f244102be0480942fbbcd8a;p=platform%2Fupstream%2Febtables.git

prevent segfault
---

diff --git a/useful_functions.c b/useful_functions.c
index e0b1e4c..a36062e 100644
--- a/useful_functions.c
+++ b/useful_functions.c
@@ -151,6 +151,8 @@ int ebt_invert = 0;
  */
 int ebt_check_inverse(const char option[])
 {
+	if (!option)
+		return ebt_invert;
 	if (strcmp(option, "!") == 0) {
 		if (ebt_invert == 1)
 			ebt_print_error("double use of '!' not allowed");