exception(Invalid offset/length when creating typed array) in ms edge browser

[a49594a]

Expected Behavior

var pixels = new Uint8Array(Math.floor(width * height * 4));

Actual Behavior

there is an exception: Invalid offset/length when creating typed array

RenderWebGL.js
_getConvexHullPointsForDrawable

var pixels = new Uint8Array(width * height * 4);

Steps to Reproduce

Operating System and Browser

windows10, ms edge browser

[thisandagain]

Resolved in #132