2010-05-01 Carlos Alberto Cortez <calberto.cortez@gmail.com>

2010-05-01  Carlos Alberto Cortez <calberto.cortez@gmail.com>

	* ToolStripItemCollection.cs: When calling Clear set Owner and Parent
	properties to null for each of the items in the collection, just as
	Remove/RemoveAt do. Implement a ClearInternal method that clears the
	collection without modifying the mentioned properties.
	* ToolStrip.cs:
	* ToolStripOverflow.cs: Call ToolStripItemCollection.ClearInternal
	for our internal collections.
	This should fix #590100, which producing a race when the garbage
	collector was calling ToolStripItem.Dispose, which in turn was firing
	a Layout in the ToolStrip.

svn path=/trunk/mcs/; revision=156564