Core/Loot: fix issue that prevented players from rolling for an unique-category item while an equipped item shares the same unique-category.

# Conflicts:
#	src/server/game/Groups/Group.cpp

src/server/game/Groups/Group.cpp

@@ -1033,7 +1033,7 @@ bool CanRollOnItem(const LootItem& item, Player const* player)
         return false;
 
     uint32 itemCount = player->GetItemCount(item.itemid);
-    if ((proto->GetMaxCount() > 0 && static_cast<int32>(itemCount) >= proto->GetMaxCount()) || (player->CanEquipUniqueItem(proto) != EQUIP_ERR_OK))
+    if (proto->GetMaxCount() > 0 && static_cast<int32>(itemCount) >= proto->GetMaxCount())
         return false;
 
     if (!item.AllowedForPlayer(player))