* Do check as same as `calculateVertices`

I already ask a question about this  https://github.com/pixijs/pixi.js/issues/3408  , but no one reply .
I think opening PR is better than asking question.

* Ensure `calculateTrimmedVertices` could run first

When first call `calculateTrimmedVertices` , it should ignore _transformID & _textureID

* Update Sprite.js

* Change names of private  temporary variables.

* Update Sprite.js

* Update Sprite.js

* Remove trailing-spaces