Blender Git Loki

Bugfix #32617

Text object render error.

Issue was caused by FLT_EPSILON being used to check for zero-sized faces, for
getting a reliable normal of front/backfaces of polygons. This value is too
small, giving occasional bad looking faces.

In other parts of code FLT_EPSILON10 was being used, that works much better.

Note for the future: here using doubles internally would be advised.