From: Dave Methvin <dave.methvin@gmail.com>
Date: Thu, 10 Mar 2011 03:38:26 +0000 (-0500)
Subject: Fixes #8456. Make sure parent is not null before crawling into its lap, so mouseenter... 
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Fixes #8456. Make sure parent is not null before crawling into its lap, so mouseenter is triggered on a mouseover event.
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