Fix probably where packets dropped because there was no recv() in place were being ACKed

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@381 42af7a65-404d-4744-a932-0658087f49c3

net/send.c

@@ -180,7 +180,8 @@ static uint8 send_interrupt(struct uip_driver_s *dev, struct uip_conn *conn, uin
 
       sem_post(&pstate->snd_sem);
     }
-  return 0;
+
+  return flags;
 }
 
 /****************************************************************************