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devcons: nil vs 0

--- a/sys/src/9/port/devcons.c

+++ b/sys/src/9/port/devcons.c

@@ -150,7 +150,7 @@

 	while(n > 0) {

 		t = memchr(str, '\n', n);

-		if(t) {

+		if(t != nil) {

 			m = t-str;

 			if(usewrite){

 				qwrite(serialoq, str, m);

@@ -302,7 +302,7 @@

 		return 0;

 	c = up->fgrp->fd[2];

-	if(c==0 || (c->mode!=OWRITE && c->mode!=ORDWR))

+	if(c==nil || (c->mode!=OWRITE && c->mode!=ORDWR))

 		return 0;

 	n = snprint(buf, sizeof buf, "%s %lud: ", up->text, up->pid);

 	va_start(arg, fmt);