A aspect ratio less than or equal to zero will cause point to not be displayed. This behavior problematic because use strokes create by Geometry Nodes (or bugs) can cause the `aspect_ratio` to default to zero. And as there is currently no operator to set `aspect_ratio` this invisible geometry can not be fixed by most users. This PR fixes this by returning `1.0f` when the `aspect_ratio` is invalided. Pull Request: https://projects.blender.org/blender/blender/pulls/146279