openlayers/ol3 — pull request #377 by marcjansen (2013-03-15 09:12:44+00:00)
Title: Use CSS class constant in zoomslider.

Commit 5e5e4d110a74218aec85bba68bc54135a9859a77 introduced the constant `ol.CSS_CLASS_UNSELECTABLE`, which wasn't used inside of the zoomslider control.

This pull request fixes this.