mtm c274def8fc NetBSD rev. 1.53, 1.54 and 1.55:
Change how internal boolean variables are used to:
	if ! ${_somevar:-false}; then
		_somevar=true
	fi
  (Consisent, slightly quicker, and slightly cleaner)

Obtained from:	NetBSD
2004-02-26 12:19:48 +00:00
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