disabled flag broken

[bill]

[9317] made the disabled flag break, as used in test_Combobox.html (and other places):

<input id="combo3"
 	dojoType="dijit.form.ComboBox"
...
	disabled
>

Presumably due to this change, removing the "!= null" check for attrValue:

if(attrValue && !dojo.isAlien(attrValue)){ // see bug#3074; ignore builtin attributes

[bill]

(In [9487]) Add tests for parsing "checked" and "disabled" attributes. Refs #3633.

[alex]

fixed in [9557]