Resolve externed prototypes in C files

include/item.h

@@ -72,10 +72,12 @@ u16 BagGetQuantityByPocketPosition(u8 pocketId, u16 itemId);
 bool8 itemid_is_unique(u16 itemId);
 void BagPocketCompaction(struct ItemSlot * slots, u8 capacity);
 u16 GetPcItemQuantity(u16 *);
+void SetBagPocketsPointers(void);
 
 void ItemPcCompaction(void);
 void RemoveItemFromPC(u16 itemId, u16 quantity);
 void SortAndCompactBagPocket(struct BagPocket * pocket);
 u8 CountItemsInPC(void);
+void ApplyNewEncryptionKeyToBagItems_(u32 newKey);
 
 #endif // GUARD_ITEM_H