K 10
svn:author
V 3
pfg
K 8
svn:date
V 27
2017-03-12T03:26:25.157406Z
K 7
svn:log
V 224
libc: small cleanups.

Unsign setlen: it is local and will never be negative. Having one more bit
for growth is beneficial and it avoids a cast when it's going to be used
for allocation.

Reviewed by:	ngie
MFC after:	3 days

END