From 32dcfafb3b8cdc22641254d50571b8be1d33fae3 Mon Sep 17 00:00:00 2001
From: Samuel Thibault <samuel.thibault@ens-lyon.org>
Date: Tue, 4 Feb 2014 19:18:54 +0100
Subject: Fix comstart when the queue is empty

Found by Coverity

* i386/i386at/com.c (comstart): Make `nch' an int.  When `getc' returns
-1, just return.
---
 i386/i386at/com.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/i386/i386at/com.c b/i386/i386at/com.c
index e1ba71a..6edbca0 100644
--- a/i386/i386at/com.c
+++ b/i386/i386at/com.c
@@ -618,7 +618,7 @@ void
 comstart(tp)
 struct tty *tp;
 {
-	char nch;
+	int nch;
 #if 0
 	int i;
 #endif
@@ -654,6 +654,8 @@ comst_4++;
 	}
 #else
 	nch = getc(&tp->t_outq);
+	if (nch == -1)
+		return;
 	if ((nch & 0200) && ((tp->t_flags & LITOUT) == 0)) {
 	    timeout((timer_func_t *)ttrstrt, (char *)tp, (nch & 0x7f) + 6);
 	    tp->t_state |= TS_TIMEOUT;
-- 
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