MdHint causes MdTab to show scrollbar

[julianobrasil]

Bug, feature request, or proposal:

Bug: MdTab shows the vertical scroll bar when it contains an md-hint inside input-container.

What is the expected behavior?

MdTab not showing the vertical scroll bar when using md-hint inside

What is the current behavior?

It's showing vertical scrollbar when I use md-hint in input-container

What are the steps to reproduce?

Try to put and remove the md-hint of this plunker: https://plnkr.co/edit/3jAsCcMtnDr3Sh39LMap?p=preview

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

Use md-hint

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

@angular/animations: 4.0.1
@angular/cli: 1.0.0
@angular/common: 4.0.1
@angular/compiler: 4.0.1
@angular/compiler-cli: 4.0.1
@angular/core: 4.0.1
@angular/flex-layout: 2.0.0-beta.7
@angular/forms: 4.0.1
@angular/http: 4.0.1
@angular/material: 2.0.0-beta.3
@angular/platform-browser: 4.0.1
@angular/platform-browser-dynamic: 4.0.1
@angular/platform-server: 4.0.1
@angular/router: 4.0.1

Is there anything else we should know?

As a workaround I'm using in styles.css

.mat-tab-body {
overflow-y: hidden !important;
}

but not sure about side efects of doing it.

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