From: Michel Pollet <buserror@gmail.com>
Date: Sat, 13 Jun 2015 20:26:50 +0000 (+0100)
Subject: vcd: Prevent crash when close() is called twice
X-Git-Tag: v1.6~68
X-Git-Url: https://git.htl-mechatronik.at/public/?a=commitdiff_plain;h=9bd0170eb36cb554301c8da8c12e73eb4189f743;p=sx%2Fsimavr.git

vcd: Prevent crash when close() is called twice

flahs() wasn't checking for a valid file pointer

Signed-off-by: Michel Pollet <buserror@gmail.com>
---

diff --git a/simavr/sim/sim_vcd_file.c b/simavr/sim/sim_vcd_file.c
index 8b18620..0999db3 100644
--- a/simavr/sim/sim_vcd_file.c
+++ b/simavr/sim/sim_vcd_file.c
@@ -126,7 +126,7 @@ static void avr_vcd_flush_log(avr_vcd_t * vcd)
 	uint64_t oldbase = 0;	// make sure it's different
 	char out[48];
 
-	if (!vcd->logindex)
+	if (!vcd->logindex || !vcd->output)
 		return;
 //	printf("avr_vcd_flush_log %d\n", vcd->logindex);