Pet/Misc: Improve Egbert's AI even more

sql/updates/world/2016_02_13_00_world.sql

@@ -0,0 +1,4 @@
+SET @ENTRY:=23258;
+SET @AURA:=40670;
+DELETE FROM `creature_template_addon` WHERE `entry` = @ENTRY;
+INSERT INTO `creature_template_addon` (`entry`, `auras`) VALUES (@ENTRY, @AURA);