Removing the "alert()"ing of errors in dojox.av.FLAudio

[Thomas Bachem]

There is an "alert()" statement in dojo.av.FLAudio line 137:

this._flashObject.onError = function(err){
	console.warn("Flash Error:", err);
	alert(err);
};

Not sure if this is a forgotten debugging helper, but please remove it as there's no way to catch it. Perhaps worth mentioning that there no such statement in the equivalent dojox.av.FLVideo code.

[Tom Trenka]

(In [23211]) Remove the alert statements from FLAudio. Fixes #11747.