multiple md-tabs not working since v0.9.7

[GautierT]

Hi, since v0.9.7 i have some weird issue with md-tabs.
Works perfectly with v0.9.6.

v0.9.7 -> master

v0.9.6

[chinnichaitanya]

A codepen might be helpful.

[GautierT]

here is it : #3166

v0.9.6 (working) : http://codepen.io/GautierThiriez/pen/GJEEdY
v0.9.7 (not working) : http://codepen.io/GautierThiriez/pen/VLWWxX
master (not working but different behavior) : http://codepen.io/GautierThiriez/pen/oXwwdp

[robertmesserle]

@GautierThiriez Excellent find, I am adding a fix for this right now.