使用pb.fields遍历枚举时，会漏掉值位0的枚举

[Jayatubi]

enum EquipPos
{
    EquipPos_Head = 0;
    EquipPos_Armor = 1;
    EquipPos_Shoe = 2;
    EquipPos_Cloak = 3;
}

for k, v, _ in pb.fields("EquipPos") do
    print(k)
    print(v)
end

输出：

EquipPos_Armor
1
EquipPos_Shoe
2
EquipPos_Cloak
3

[starwing]

已经修复