Validation function buggy behaviour

[pyxarez]

https://github.com/jugglinmike/srcdoc-polyfill/blob/master/srcdoc-polyfill.js#L33
This is a bug it should look like this:

...
} else if (!options || options.force === false) {
...

Just think about it
The second check (!options || options.force !== false) does not make sense
The case should be triggered when there is some options passed in and the "force" property has "not falsy" value what is literally duplicate the first if branch