Compiling on Linux with -Wundef produces the following warning:
warning: "__OpenBSD__" is not defined, evaluates to 0 [-Wundef]
Signed-off-by: Olivier Gayot <olivier.gayot@sigexec.com>
#include <sys/stat.h>
#include <sys/statvfs.h>
#include <sys/types.h>
-#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || (__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
+#if defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
#include <sys/param.h>
#include <sys/mount.h>
#elif defined(__NetBSD__)