computer-time-limit.php: check db for whether a host is non-null when querying the times

1 files changed, 1 insertions, 1 deletions

diff --git a/computer-time-limit.php b/computer-time-limit.php
index 12fcfeb..1fc8f3e 100644
--- a/computer-time-limit.php
+++ b/computer-time-limit.php
@@ -124,7 +124,7 @@ while ($row = $result->fetchArray()) {
   $von = strtotime($row['von']);
 
   $bis = $bis + 30*60*(floor($now/60/60/24) - floor($von/60/60/24));
-  if (!is_null($host)) {
+  if (!is_null($row['host'])) {
     $von = $now;
   }
   $noch = $bis - $von;