From 251684617601374eaa640b3f3ef6f15003197aff Mon Sep 17 00:00:00 2001
From: Isaac Connor <iconnor@testing.internal.point-one.com>
Date: Thu, 19 Apr 2018 14:22:19 -0400
Subject: [PATCH] only update DiskSpace if new DiskSpace is defined

---
 scripts/zmfilter.pl.in | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/scripts/zmfilter.pl.in b/scripts/zmfilter.pl.in
index 12dae98cf..20c8569d8 100644
--- a/scripts/zmfilter.pl.in
+++ b/scripts/zmfilter.pl.in
@@ -340,7 +340,13 @@ sub checkFilter {
       $Event->lock_and_load();
 
       my $old_diskspace = $$Event{DiskSpace};
-      if ( $old_diskspace != $Event->DiskSpace(undef) ) {
+			my $new_diskspace = $Event->DiskSpace(undef);
+
+      if (
+					( (!defined $old_diskspace) and defined $new_diskspace)
+					or
+					( (defined $old_diskspace) and (defined $new_diskspace) and ( $old_diskspace != $Event->DiskSpace(undef) ) )
+					) {
         $Event->save();
       }
       $ZoneMinder::Database::dbh->commit();