Default is NO.

Cf. http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/CocoaPerformance/Articles/CustomViews.html

Based on patch by Juha Riihimäki.
Signed-off-by: NAndreas Färber <andreas.faerber@web.de>
Cc: Juha Riihimäki <juha.riihimaki@nokia.com>
Cc: Alexander Graf <alex@csgraf.de>
Cc: Mike Kronenberg <mike.kronenberg@kronenberg.org>
Signed-off-by: Nmalc <av1474@comtv.ru>