From b6e40b3ef84046fa61b87d8c7c8de0f08f4a5ec4 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Sat, 13 Jun 2015 21:37:30 +0200
Subject: [PATCH] check before dereference

---
 rregsub.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/rregsub.c b/rregsub.c
index 2419137..0b47799 100644
--- a/rregsub.c
+++ b/rregsub.c
@@ -26,7 +26,7 @@ rregsub(Rune *sp,	/* source string */
 			case '8':
 			case '9':
 				i = *sp-'0';
-				if(mp[i].s.rsp != 0 && mp!=0 && ms>i)
+				if(mp!=0 && mp[i].s.rsp != 0 && ms>i)
 					for(ssp = mp[i].s.rsp;
 					     ssp < mp[i].e.rep;
 					     ssp++)
@@ -46,7 +46,7 @@ rregsub(Rune *sp,	/* source string */
 				break;
 			}
 		}else if(*sp == '&'){
-			if(mp[0].s.rsp != 0 && mp!=0 && ms>0)
+			if(mp!=0 && mp[0].s.rsp != 0 && ms>0)
 				for(ssp = mp[0].s.rsp;
 				     ssp < mp[0].e.rep; ssp++)
 					if(dp < ep)
-- 
2.49.0