Fix doughnut sample (#6690)

diff --git a/src/core/core.controller.js b/src/core/core.controller.js
index df71561727121039e5659bc66321c9015517c3d2..ad841ca6ec7f22de64b4b4c3c752b3efc72dc785 100644 (file)
--- a/src/core/core.controller.js
+++ b/src/core/core.controller.js
@@ -449,7 +449,7 @@ helpers.extend(Chart.prototype, /** @lends Chart */ {
        },
 
        /**
-       * Resets the chart back to it's state before the initial animation
+       * Resets the chart back to its state before the initial animation
        */
        reset: function() {
                this.resetElements();
@@ -460,6 +460,8 @@ helpers.extend(Chart.prototype, /** @lends Chart */ {
                var me = this;
                var i, ilen;
 
+               config = config || {};
+
                updateConfig(me);
 
                // plugins options references might have change, let's invalidate the cache