On the homepage of the blog, there is no category, therefore, a `.query('')` was called, which crashed and halted the node.js server.

Now, on the blog homepage, the `query` method is never called, since there's nothing to query about anyway; it is only called when needed, in the blog category pages.

Just talked with Guillaume, he advised me to also handle it in the JS dev kit (no adding a `q` parameter if `query` is called on an empty string), I'll do it today.