Zval::null() to get a null in one call

[kakserpom]

I wrote this trait some time ago:

pub trait ZvalNull {
    /// Returns a new `Zval` explicitly set to `null`.
    fn null() -> Zval;
}

impl ZvalNull for Zval {
    fn null() -> Zval {
        let mut zval = Zval::new();
        zval.set_null();
        zval
    }
}

What do you guys think about adding such method to impl Zval?

[Xenira]

Could be helpful. Might want to check if there is already a const in zend that can be used. Like #355

[kakserpom]

Done in #521