From 2a31f6dbd7c63232918d175fb2879682217946ea Mon Sep 17 00:00:00 2001
From: Aleksander Machniak <alec@alec.pl>
Date: Wed, 25 Feb 2015 15:08:16 -0500
Subject: [PATCH] Reset default db_max_allowed_packet, fix max packet size detection

---
 program/lib/Roundcube/rcube_cache.php |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/program/lib/Roundcube/rcube_cache.php b/program/lib/Roundcube/rcube_cache.php
index 52a2db9..303abda 100644
--- a/program/lib/Roundcube/rcube_cache.php
+++ b/program/lib/Roundcube/rcube_cache.php
@@ -605,8 +605,10 @@
             $this->max_packet = 2097152; // default/max is 2 MB
 
             if ($this->type == 'db') {
-                $value = $this->db->get_variable('max_allowed_packet', $this->max_packet);
-                $this->max_packet = max($value, $this->max_packet) - 2000;
+                if ($value = $this->db->get_variable('max_allowed_packet', $this->max_packet)) {
+                    $this->max_packet = $value;
+                }
+                $this->max_packet -= 2000;
             }
             else if ($this->type == 'memcache') {
                 $stats = $this->db->getStats();

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