Fix getErrors issue when field has not error

[thewebartisan7]

Maybe I am missing something, but if I try to get all errors for all input, sometime field has not property errors.

Before checking field.errors.length I add a check if field.errors is set.

Otherwise there is an error in console.

[engram-design]

+1 for this, just hit this with using

const inputs = $page.querySelectorAll('input, select, textarea');
pristine.validate(inputs)