Incorrect rendering in browsers other than Chrome

[dennybiasiolli]

Hi,
as you can see in this example on codepen, when we use an Array as "dataset.backgroundColor" (for example in Bar charts), legend is dislpayed incorrectly on Safari and Firefox.

ctx.fillStyle = itemOrDefault(legendItem.fillStyle, Chart.defaults.global.defaultColor);

ctx.fillStyle can be only strings, CanvasGradients, or CanvasPatterns.