dojo._Animation.play() goes into an infinite loop when this.delay is > 0

[simonjb]

dojo._Animation.play() contains the following statements:

var d = delay||this.delay;
if(d > 0){
	setTimeout(dojo.hitch(this, function(){ this.play(null, gotoStart); }), d);
	return this; // dojo._Animation
}

If this.delay is > 0 then the setTimeout() call will always happen and we will have an infinite loop.

[simonjb]

Test case attached.

[dante]

refs/see #4402

[Ben Lowery]

(In [10645]) fixes #4586

[Ben Lowery]

(In [10646]) testcase for delay. refs #4586