squash: fixed release in case of no one interested

sys/net/link_layer/ng_nomac/ng_nomac.c

@@ -50,14 +50,11 @@ static void _event_cb(ng_netdev_event_t event, void *data)
         pkt = (ng_pktsnip_t *)data;
         /* find out, who to send the packet to */
         sendto = ng_netreg_lookup(pkt->type, NG_NETREG_DEMUX_CTX_ALL);
-
-#if ENABLE_DEBUG
+        /* throw away packet if no one is interested */
         if (sendto == NULL) {
             DEBUG("nomac: unable to forward packet of type %i\n", pkt->type);
             ng_pktbuf_release(pkt);
         }
-#endif
-
         /* send the packet to everyone interested in it's type */
         ng_pktbuf_hold(pkt, ng_netreg_num(pkt->type, NG_NETREG_DEMUX_CTX_ALL) - 1);
         while (sendto != NULL) {