- Fix build with libstatgrab 0.90

PR:		ports/189738
Approved by:	maintainer


git-svn-id: http://svn.freebsd.org/ports/head/net-mgmt/collectd5@353902 35697150-7ecd-e111-bb59-0022644237b5
Merge branch 'upstream' into LLNW

Conflicts:
	Makefile