nonrandomopentest.c: include compat.h

to make its behaviour match ziptool more closely

regress/nonrandomopentest.c

diff --git a/regress/nonrandomopentest.c b/regress/nonrandomopentest.c
index 74401e4..95bdf9b 100644
--- a/regress/nonrandomopentest.c
+++ b/regress/nonrandomopentest.c
@@ -31,6 +31,10 @@
   IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
 
+/* to get the same defines that other tools get, in particular
+ * overrides for file offset sizes from config.h */
+#include "compat.h"
+
 #include <errno.h>
 #include <fcntl.h>
 #include <stdio.h>