Konstantin Belousov c92f130498 Fix undefined behavior.
Create a sequence point by ending a full expression for call to
vspace() and use of the globals which are modified by vspace().

Reported and reviewed by:	imp
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
Differential revision:	https://reviews.freebsd.org/D22126
2019-10-23 16:06:47 +00:00
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