AutoComplete value of number 0

[antangeles]

Bug, feature request, or proposal:

When selecting the value of the number 0 from a drop down list of numbers, the value 0 is not set. A user can manually type in 0.

What is the expected behavior?

When selecting the value of the number 0 from a drop down list of numbers, the value 0 is set

What is the current behavior?

When selecting the value of the number 0 from a drop down list of numbers, the value 0 is not set and has a blank value in the input field.

What are the steps to reproduce?

https://plnkr.co/edit/czRXKtRzVyb2WyYFkWyM?p=preview

Select 0. The input will remain empty.

What is the use-case or motivation for changing an existing behavior?

Would like the ability to choose the number 0 as a value.

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

current angular, current material, tested on windows 10, chrome

Is there anything else we should know?

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