K 10
svn:author
V 6
brucec
K 8
svn:date
V 27
2010-11-21T14:34:25.406781Z
K 7
svn:log
V 371
dispatch_add_command:
Modify the logic so there's only one exit point instead of two.
Only insert valid (non-NULL) values into the queue.

dispatch_free_command:
Ensure that item is not NULL before removing it from the queue and
dereferencing the pointer.
NULL out free'd pointers to catch any use-after-free bugs.

PR:	bin/146855
Submitted by:	gcooper
MFC after: 3 days

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