legend: fix rendering in browsers other than Chrome when dataset.backgroundColor...

diff --git a/src/core/core.legend.js b/src/core/core.legend.js
index f625bb8818e4b93d33ddf6a9f491f9f49cab8580..6b18c0a7024a4adf73bdc780adbcf8ef82aee3f4 100644 (file)
--- a/src/core/core.legend.js
+++ b/src/core/core.legend.js
@@ -44,7 +44,7 @@ module.exports = function(Chart) {
                                return helpers.isArray(data.datasets) ? data.datasets.map(function(dataset, i) {
                                        return {
                                                text: dataset.label,
-                                               fillStyle: dataset.backgroundColor,
+                                               fillStyle: (!helpers.isArray(dataset.backgroundColor) ? dataset.backgroundColor : dataset.backgroundColor[0]),
                                                hidden: !chart.isDatasetVisible(i),
                                                lineCap: dataset.borderCapStyle,
                                                lineDash: dataset.borderDash,