md-autocomplete height not fill the items list in one case

[WedgeSama]

When autocomplete is use with a promise to get result from API, and only on the first use of the input, if you write a query with no result, you got the md-not-found with a much bigger height them html in the template (see attached screens).

This issue is on HEAD and still on 1.0.0-rc1.
Fork pen from HEAD with the bug.