[libgtop] Adjust header inclusion on OpenBSD

[Jasper Lievisse Adriaanse <jasperla src gnome org>]

commit 07d2816d5b39325bd7381024a88c61b7c56f7b62
Author: Jasper Lievisse Adriaanse <jasper humppa nl>
Date:   Thu Jan 23 10:30:53 2014 +0100

    Adjust header inclusion on OpenBSD
    
    - fixup header inclusion after netinet/in_var.h was made private
    - configure fails to define HAVE_NET_IF_VAR_H

 sysdeps/openbsd/netload.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/sysdeps/openbsd/netload.c b/sysdeps/openbsd/netload.c
index 773d81c..c172bba 100644
--- a/sysdeps/openbsd/netload.c
+++ b/sysdeps/openbsd/netload.c
@@ -36,12 +36,12 @@
 
 #include <sys/ioctl.h>
 
-#ifdef HAVE_NET_IF_VAR_H
 #include <net/if_var.h>
-#endif
 
 #include <netinet/in.h>
+#define _KERNEL
 #include <netinet/in_var.h>
+#undef _KERNEL
 #include <netinet6/in6_var.h>
 
 static const unsigned long _glibtop_sysdeps_netload =