Core: use enum InventoryResult as return type for functions working with player items.

Original patch by TOM_RUS.

src/server/game/Entities/Item/Item.cpp

@@ -804,7 +804,7 @@ bool Item::IsBoundByEnchant() const
     return false;
 }
 
-uint8 Item::CanBeMergedPartlyWith(ItemTemplate const* proto) const
+InventoryResult Item::CanBeMergedPartlyWith(ItemTemplate const* proto) const
 {
     // not allow merge looting currently items
     if (m_lootGenerated)

src/server/game/Entities/Item/Item.h

@@ -36,7 +36,7 @@ struct ItemSetEffect
     SpellEntry const *spells[8];
 };
 
-enum InventoryChangeFailure
+enum InventoryResult
 {
     EQUIP_ERR_OK                                 = 0,
     EQUIP_ERR_CANT_EQUIP_LEVEL_I                 = 1,
@@ -79,7 +79,7 @@ enum InventoryChangeFailure
     EQUIP_ERR_YOU_ARE_DEAD                       = 38,
     EQUIP_ERR_CANT_DO_RIGHT_NOW                  = 39,
     EQUIP_ERR_INT_BAG_ERROR                      = 40,
-    EQUIP_ERR_CAN_EQUIP_ONLY1_QUIVER2            = 41,
+    EQUIP_ERR_CAN_EQUIP_ONLY1_BOLT               = 41,
     EQUIP_ERR_CAN_EQUIP_ONLY1_AMMOPOUCH          = 42,
     EQUIP_ERR_STACKABLE_CANT_BE_WRAPPED          = 43,
     EQUIP_ERR_EQUIPPED_CANT_BE_WRAPPED           = 44,
@@ -129,7 +129,7 @@ enum InventoryChangeFailure
     EQUIP_ERR_ITEM_MAX_LIMIT_CATEGORY_EQUIPPED_EXCEEDED  = 89
 };
 
-enum BuyFailure
+enum BuyResult
 {
     BUY_ERR_CANT_FIND_ITEM                      = 0,
     BUY_ERR_ITEM_ALREADY_SOLD                   = 1,
@@ -142,7 +142,7 @@ enum BuyFailure
     BUY_ERR_REPUTATION_REQUIRE                  = 12
 };
 
-enum SellFailure
+enum SellResult
 {
     SELL_ERR_CANT_FIND_ITEM                      = 1,
     SELL_ERR_CANT_SELL_ITEM                      = 2,       // merchant doesn't like that item
@@ -277,7 +277,7 @@ class Item : public Object
         uint32 GetMaxStackCount() const { return GetTemplate()->GetMaxStackSize(); }
         uint8 GetGemCountWithID(uint32 GemID) const;
         uint8 GetGemCountWithLimitCategory(uint32 limitCategory) const;
-        uint8 CanBeMergedPartlyWith(ItemTemplate const* proto) const;
+        InventoryResult CanBeMergedPartlyWith(ItemTemplate const* proto) const;
 
         uint8 GetSlot() const {return m_slot;}
         Bag *GetContainer() { return m_container; }