Function fz_transform_point 

pub unsafe extern "C" fn fz_transform_point(
    point: fz_point,
    m: fz_matrix,
) -> fz_point

Apply a transformation to a point.

transform: Transformation matrix to apply. See fz_concat,
fz_scale, fz_rotate and fz_translate for how to create a
matrix.

point: Pointer to point to update.

Returns transform (unchanged).