lguest: fix occasional crash in example launcher.
authorRusty Russell <rusty@rustcorp.com.au>
Thu, 4 Oct 2012 02:33:25 +0000 (12:03 +0930)
committerRusty Russell <rusty@rustcorp.com.au>
Thu, 4 Oct 2012 02:42:59 +0000 (12:12 +0930)
We usually got away with ->next on the final entry being NULL, but it
finally bit me.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: stable@kernel.org

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