Division by zero risk when restoring the queue

count % q_depth will divide by zero if q_depth is 0 (e.g., after teardown/reconfigure or if init is skipped). Add an explicit guard for q_depth == 0 before the modulo.

Author: stevegrubb

audisp/queue.c

@@ -83,6 +83,10 @@ static int queue_load_file(int fd)
 	if (fd < 0)
 		return -1;
 
+	if (q_depth == 0) {
+		syslog(LOG_ERR, "Queue depth is zero, cannot restore queue");
+		return -1;
+	}
 	dup_fd = dup(fd);
 	if (dup_fd < 0)
 		return -1;