Pagination component and 3.X version behave inconsistently —— pagination组件和3.X版本的表现不一致

[thding]

• I have searched the issues of this repository and believe that this is not a duplicate.

Reproduction link

Steps to reproduce

Open the link and add the pagination property to the Table component. The property value is {total: null}. Pagination cannot be used in 4.X version. After changing the version of antd to 3.X, the pagination component can be used normally —— 打开链接，在Table组件中添加pagination属性,属性值为{total:null}，在4.X版本pagination无法使用。将antd的版本改为3.X后，pagination组件可以正常使用

What is expected?

Consistent with version 3.X —— 和3.X版本行为保持一致

What is actually happening?

pagination component is not working —— pagination组件无法使用

Environment	Info
antd	4.0.0-beta.1
React	16.12.0
System	macOS Catalina 10.15.2
Browser	Chrome 81.0.4011.0 canary (64)

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Is this an intentional change? Make the null value of the total attribute behave correctly? However, I personally think this is a break change. In the original 3.X version, the boundary treatment of null values should be retained —— 这是有意的改动吗？使得total属性的null值得到正确的表现？但是个人觉得这是个break change，在原有的3.X版本中对null值进行的边界处理我觉得应该保留