Function scale_path_uniform 

pub fn scale_path_uniform<T1, T2>(
    path: &Path<T2>,
    scale: f64,
    error_code: &mut i32,
) -> Path<T1>
where
    T1: Num + Copy + PartialOrd + FromF64,
    T2: Copy + ToF64,

Scale a path with uniform scale Direct port from clipper.core.h line 550