From 260c8c8ff4ed04b8d33b3079725d7d4cb3560968 Mon Sep 17 00:00:00 2001
From: Andreas Perhab <andreas.perhab@wt-io-it.at>
Date: Fri, 24 Jul 2020 14:02:30 +0200
Subject: [PATCH] docker_cpu: fix warnings when docker ps has empty list

---
 plugins/docker/docker_cpu | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/plugins/docker/docker_cpu b/plugins/docker/docker_cpu
index 9194edc6..62c5d080 100755
--- a/plugins/docker/docker_cpu
+++ b/plugins/docker/docker_cpu
@@ -86,9 +86,9 @@ for my $i (1 .. $#containers)
 if (defined $ARGV[0] and $ARGV[0] eq "config")
 {
    my $nanoSecondsInSecond=1000000000;
-   my $graphlimit = $result[0]{'ncpu'};
+   my $graphlimit = 1;
    foreach(@result){
-      if ($$_{'ncpu'} > $graphlimit){
+      if ($$_{'ncpu'} || 1 > $graphlimit){
          $graphlimit = $$_{'ncpu'};
       }
    }