Merge pull request #828 from oskarnp/pr-ipolite-fix

ipolite: stop ctimer and reset queuebuf pointer when canceling old send

core/net/rime/ipolite.c

@@ -148,6 +148,8 @@ ipolite_send(struct ipolite_conn *c, clock_time_t interval, uint8_t hdrsize)
     PRINTF("%d.%d: ipolite_send: cancel old send\n",
 	   linkaddr_node_addr.u8[0],linkaddr_node_addr.u8[1]);
     queuebuf_free(c->q);
+    c->q = NULL;
+    ctimer_stop(&c->t);
   }
   c->dups = 0;
   c->hdrsize = hdrsize;