refactors parse chack for NaN to use common idiom for testing without using the coercign side effects of isNaN by checking equality to iteself
refactors parse chack for NaN to use common idiom for testing without using the coercign side effects of isNaN by checking equality to iteself

JustinBeaudry/vault.js,vitamink/vault.js,dzoba/vault.js,jimmybyrum/vault.js