<AWT Dev> [PATCH] Fix invalid PropertyChangeEvents from being propagated

[Omair Majid]

Hi,

The current implementation of AccessibleContext propagates 
PropertyChangeEvents that dont correspond do a change. This patch checks 
that the new value and the old value are different before firing a 
PropertyChangeEvent. This has been committed to icedtea as 
http://icedtea.classpath.org/hg/icedtea6/rev/136f40a0dae4.

Apologies in advance if this isn't the correct list to post this patch.

Cheers,

Omair
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