* Implement item limit category (based on changes by VladimirMangos)

* Additional check for HandleAutoBankItemOpcode (thanks to VladimitMangos)
* Properly show empty vendor list for empty item list (author: a1ien)
* More stricted checks for store operations (thanks to VladimirMangos)
* Prevent autostoring of not empty bags (thanks to L1ghtGu4rd)

Changes need testing. Please post bugs on our tracker.

--HG--
branch : trunk

src/server/game/DataStores/DBCEnums.h

@@ -336,6 +336,12 @@ enum ItemEnchantmentType
     ITEM_ENCHANTMENT_TYPE_PRISMATIC_SOCKET = 8
 };
 
+enum ItemLimitCategoryMode
+{
+    ITEM_LIMIT_CATEGORY_MODE_HAVE  = 0,                      // limit applied to amount items in inventory/bank
+    ITEM_LIMIT_CATEGORY_MODE_EQUIP = 1,                      // limit applied to amount equipped items (including used gems)
+};
+
 enum TotemCategoryType
 {
     TOTEM_CATEGORY_TYPE_KNIFE   = 1,