error style in nested table

[vthinkxie]

Version

3.0.0

Environment

react 16.2

Reproduction link

https://codesandbox.io/s/xj4p85xx1z

Steps to reproduce

parent table with size="small" and child table with size="middle"

What is expected?

correct middle table's style

What is actually happening?

chid middle table's style is small

[afc163]

          <Table
            size="middle"
            columns={columns}
            dataSource={data}
-           size="small"
          />

[vthinkxie]

same error style when remove this line.

[afc163]

Fixed that.