From 70165f7f78642253da8168d2a57b81bd6caf5bb6 Mon Sep 17 00:00:00 2001
From: David du Colombier <0intro@gmail.com>
Date: Thu, 9 Aug 1990 00:00:00 +0000
Subject: [PATCH] Plan 9 from Bell Labs 1990-08-09

---
 gnot/sturp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gnot/sturp.c b/gnot/sturp.c
index 5902d1f4c176f22ee08ab14b7755504a1396f6dc..93b226aefe6b451fb6977f04517a7fcd91d53c4b 100644
--- a/gnot/sturp.c
+++ b/gnot/sturp.c
@@ -11,7 +11,7 @@ enum {
 	Nmask=		0x7,
 };
 
-#define DPRINT /*if(q->flag&QDEBUG)kprint*/
+#define DPRINT if(q->flag&QDEBUG)kprint
 
 typedef struct Urp	Urp;
 
@@ -947,6 +947,7 @@ todo(void *arg)
 	return (up->state&INITING)
 	? NOW>up->timer					/* time to INIT1 */
 	: ((up->unacked!=up->next && NOW>up->timer)	/* time to ENQ */
+	  || WINDOW(up)>0 && up->next!=up->nxb
 	  || (!QFULL(up->rq->next) && up->iseq!=(up->lastecho&7))); /* time to ECHO */
 }
 static void