* generic/tkGrid.c (GridStructureProc, ConfigureSlaves):

	Check for a NULL masterPtr and slavePtr in the
	GridStructureProc code to ensure that a Gridder
	created before some error condition is ignored
	when it comes to geometry calculations. This
	approach closely matches the pack implementation.
	Keep track of a -in argument to a grid command
	in order to detect the case of an already
	gridded widget that wants to change some options.
	The previous implementation could make repeated
	and unnecessary calls to Tk_ManageGeometry.
	Replace use of "parent" with "master" in comments
	throughout the file.
	* generic/tkPack.c (PackStructureProc): Check for
	a NULL masterPtr before other checks so that a
	slave created under certain error conditions
	is cleaned up properly.
	Replace use of "parent" with "master" in comments
	throughout the file.
	* generic/tkPlace.c (CreateSlave, ConfigureSlave,
	SlaveStructureProc):
	Don't call Tk_ManageGeometry in CreateSlave since
	this was causing incorrect results in some error
	cases. Rework the ConfigureSlave method so that
	slave setup is done in one place. The call to
	Tk_ManageGeometry was added to the one place
	where a slave is setup. When a slave is configured
	but the master is not changed, simply goto the
	scheduleLayout label. Check for a NULL master
	in SlaveStructureProc for the sake of readability.
	* tests/grid.test:
	* tests/pack.test:
	* tests/place.test: Add test to check that a
	winfo manager call does not return incorrect
	results after an error condition is hit.
	[Patch 693063]

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