Fix possible crash when using pattern ACLs.

ChangeLog.txt

@@ -1,3 +1,7 @@
+Broker:
+- Fix possible crash when using pattern ACLs.
+
+
 1.4 - 20150218
 ==============
 

src/mosquitto_broker.h

@@ -102,7 +102,7 @@ struct mqtt3_config {
 	bool log_timestamp;
 	char *log_file;
 	FILE *log_fptr;
-	int message_size_limit;
+	uint32_t message_size_limit;
 	char *password_file;
 	bool persistence;
 	char *persistence_location;

src/security_default.c

@@ -136,6 +136,8 @@ int _add_acl(struct mosquitto_db *db, const char *user, const char *topic, int a
 	acl->access = access;
 	acl->topic = local_topic;
 	acl->next = NULL;
+	acl->ccount = 0;
+	acl->ucount = 0;
 
 	/* Add acl to user acl list */
 	if(acl_user->acl){
@@ -196,7 +198,7 @@ int _add_acl_pattern(struct mosquitto_db *db, const char *topic, int access)
 		}
 	}
 
-	acl->ccount = 0;
+	acl->ucount = 0;
 	s = local_topic;
 	while(s){
 		s = strstr(s, "%u");