server/mpm/event/event.c:2847: error: UNINITIALIZED_VALUE
  The value read from free_slots[_] was never initialized.

server/mpm/event/event.c:2847:17: 
2845.             }
2846.             for (i = 0; i < free_length; ++i) {
2847.                 make_child(ap_server_conf, free_slots[i], child_bucket);
                      ^
2848.             }
2849.             /* the next time around we want to spawn twice as many if this
