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author	David Lamparter <equinox@opensourcerouting.org>
	Wed, 29 Sep 2021 20:15:11 +0000 (22:15 +0200)
committer	David Lamparter <equinox@opensourcerouting.org>
	Tue, 19 Oct 2021 12:55:39 +0000 (14:55 +0200)
commit	d259ca0989c793767c912622437c3c5b2c6d84b2
tree	6dac6cc1a48f47edde0c52a248dff2c1c09256e7	tree
parent	f45897e45c57db80b21e31d44723733a17bfac54	commit \| diff

lib: use sentinel for single-linked lists

Using a non-NULL sentinel allows distinguishing between "end of list"
and "item not on any list". It's a compare either way, just the value
is different.

Signed-off-by: David Lamparter <equinox@opensourcerouting.org>

lib/typesafe.c		diff \| blob \| blame \| history
lib/typesafe.h		diff \| blob \| blame \| history

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