--- libaitmqtt/src/aitmqtt.c	2012/04/26 15:38:32	1.1.1.1.2.8
+++ libaitmqtt/src/aitmqtt.c	2012/04/27 08:12:30	1.1.1.1.2.9
@@ -3,7 +3,7 @@
 *  by Michael Pounov <misho@openbsd-bg.org>
 *
 * $Author: misho $
-* $Id: aitmqtt.c,v 1.1.1.1.2.8 2012/04/26 15:38:32 misho Exp $
+* $Id: aitmqtt.c,v 1.1.1.1.2.9 2012/04/27 08:12:30 misho Exp $
 *
 **************************************************************************
 The ELWIX and AITNET software is distributed under the following
@@ -367,17 +367,23 @@ mqtt_subAlloc(u_short num)
  * return: NULL error or subscribe array, after use must call mqtt_subFree()
  */
 inline mqtt_subscr_t *
-mqtt_subRealloc(mqtt_subscr_t * __restrict subs, u_short num)
+mqtt_subRealloc(mqtt_subscr_t ** __restrict subs, u_short num)
 {
 	mqtt_subscr_t *s = NULL;
 
-	s = realloc(subs, (num + 1) * sizeof(mqtt_subscr_t));
+	if (!subs)
+		return NULL;
+
+	s = realloc(*subs, (num + 1) * sizeof(mqtt_subscr_t));
 	if (!s) {
 		LOGERR;
 		return NULL;
+	} else {
+		memset(s + num, 0, sizeof(mqtt_subscr_t));
+		*subs = s;
 	}
 
-	return s;
+	return *subs;
 }
 
 /*