PHP crash when poller queries bind application

[root@nms observium]# ./poller.php -h <DNSserver>
...
#####  Starting polling run at 2018-04-12 06:11:23  #####
#####  <DNSserver> [235]  #####
....
#####  Module Start: applications  #####

 o Applications        bind .PHP Fatal error:  Uncaught ArgumentCountError: Too few arguments to function array_sort(), 1 passed in /opt/observium/includes/polling/applications/bind.inc.php on line 82 and at least 2 expected in /opt/observium/includes/functions.inc.php:186
Stack trace:
#0 /opt/observium/includes/polling/applications/bind.inc.php(82): array_sort(Array)
#1 /opt/observium/includes/polling/applications.inc.php(33): include('/opt/observium/...')
#2 /opt/observium/includes/polling/functions.inc.php(682): include('/opt/observium/...')
#3 /opt/observium/poller.php(172): poll_device(Array, Array)
#4 {main}
  thrown in /opt/observium/includes/functions.inc.php on line 186
[root@nms observium]#

Fixed by:

[root@nms observium]# svn diff /opt/observium/includes/polling/applications/bind.inc.php

Index: /opt/observium/includes/polling/applications/bind.inc.php

===================================================================

--- /opt/observium/includes/polling/applications/bind.inc.php	(revision 9181)

+++ /opt/observium/includes/polling/applications/bind.inc.php	(working copy)

@@ -79,7 +79,7 @@

   );

   $ns_stats_fields = array_values($ns_stats_field_mapping);

-  array_sort($ns_stats_fields);

+  array_sort($ns_stats_fields, 'Requestv4');

   $ns_stats = array();

   foreach ($ns_stats_fields as $field)

@@ -105,7 +105,7 @@

   );

   $zone_maint_fields = array_values($zone_maint_field_mapping);

-  array_sort($zone_maint_fields);

+  array_sort($zone_maint_fields, 'NotifyOutv4');

   $zone_maint = array();

   foreach ($zone_maint_fields as $field)

@@ -148,7 +148,7 @@

   );

   $resolver_fields = array_values($resolver_field_mapping);

-  array_sort($resolver_fields);

+  array_sort($resolver_fields, 'Queryv4');

   $resolver = array();