Add missing "!= NULL", for the sake of consistency.

Heikki Linnakangas <heikki.linnakangas@iki.fi>

Commit: b3a1ef53c3ce6f91226303a2455e932de475cde3
Author: Heikki Linnakangas <heikki.linnakangas@iki.fi>
Date: 2010-01-20T11:58:44Z
Releases: 9.0.0
Add missing "!= NULL", for the sake of consistency.

Fujii Masao

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