Fix Typo
Fix Typo

Summary: Closes https://github.com/facebook/yoga/pull/556

Differential Revision: D5102089

Pulled By: emilsjolander

fbshipit-source-id: 340cab34189628318c08ec45fe8c50a5c1970a17

facebook/yoga,facebook/css-layout,facebook/css-layout,facebook/css-layout,facebook/yoga,facebook/yoga,facebook/yoga,facebook/yoga,facebook/yoga,facebook/css-layout,facebook/css-layout,facebook/yoga,facebook/css-layout,facebook/css-layout,facebook/yoga,facebook/css-layout,facebook/yoga,facebook/css-layout,facebook/yoga