From 43d1a2b4434427c3d438b18b6be109fdd62ef391 Mon Sep 17 00:00:00 2001
From: Michal Sojka <sojkam1@fel.cvut.cz>
Date: Mon, 6 Dec 2010 13:31:47 +0100
Subject: [PATCH] Do not invoke gnuplot when there is nothing to plot

---
 gw-tests/lib.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gw-tests/lib.sh b/gw-tests/lib.sh
index 4d6e2d7..467321d 100644
--- a/gw-tests/lib.sh
+++ b/gw-tests/lib.sh
@@ -44,6 +44,7 @@ _plot() {
     local testname=`basename $0 .sh`
 
     plot_cmds | sed -e "/set title/ s/[\"']\(.*\)[\"']/\"\1\\\\n($kvers)\"/" > plot.gp
+    if [[ ! -s plot.gp ]]; then return; fi
     if [ -z "$OPT_NO_X11" ]; then
 	echo "set terminal x11 enhanced; $(< plot.gp)" | gnuplot -persist
     fi
-- 
2.39.2