DB/Creature: Wotlk armor values for meleebosses

* fix a type
* closes #15106

sql/updates/world/2016_02_07_05_world_335.sql

@@ -0,0 +1,4 @@
+-- 
+-- Wotlk armor value
+UPDATE `creature_classlevelstats` SET `basearmor`=10643 WHERE `level`=83 AND `class`=1;
+UPDATE `creature_classlevelstats` SET `basearmor`=10643 WHERE `level`=83 AND `class`=2;