Yoga-rs segfault on drop

yoga-issue.rs

extern crate yoga;

fn main() {
    let mut children = Vec::new();
    let mut root = yoga::Node::new();

    for i in 0..1000 {
        let mut c = yoga::Node::new();
        root.insert_child(&mut c, 0);
        children.push(c);
    }

    // destruction happens here: first root, then children
}