Crashes when rendering or animating determinant 0 matrices

[DoctorDalek1963]

When rendering a matrix with determinant 0, the program crashes, complaining that it can't convert infinity to integer when trying to draw the grid lines. When animating, it crashes near the end of the animation, as everything collapses into a lower dimension. When we're rendering a matrix with determinant 0, we shouldn't draw the grid lines.