An image res' name may be wrong

[TonnyL]

All the empty placeholder images are named ic_empty_zhihu.png, but in drawable-xhdpi, there is no such file, but a image named ic_emtpy_light.png was found. I think it may be a bug🐛.

Here are the screenshots.

[REBOOTERS]

en ,it's really is a bug .will be fixed in next release.

[TonnyL]

@REBOOTERS

Thanks for your amazing work!