Fixing transform issues

[ondra-vaic]

Hey, thank you for sharing this awesome grass shader. There is a small issue which breaks the transformations. There's an open pull request attempting to fix it already, however that breaks when the meshes are rotated. I believe this actually fixes all the issues.

The problem was, that the geometry stage receives vertices in world space but then transforms them to clip space with TransformObjectToHClip.

After:

[BenetManzanaresSalor]

I second that this simple change solves the problem!

[DarkanVIII]

Thank you very much! I hope he includes this change.