Misalignment of [md-ink-bar] first active child

[frankspin89]

Bug, feature request, or proposal:

BUG

What is the current behavior?

On the initial load the first active child of the bar is not aligned correctly. After clicking on the child the active bar is positioned correctly.

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

Angular 4.0.5 rc
Material beta 2

[fxck]

most likely dupe of #3495

[jelbourn]

Dupe of #3495

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