Suggest better types in examples; from NetBSD

src/lib/libc/stdlib/getopt.3

@@ -29,7 +29,7 @@
 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 .\" SUCH DAMAGE.
 .\"
-.\"	$OpenBSD: getopt.3,v 1.16 2002/02/23 19:54:29 miod Exp $
+.\"	$OpenBSD: getopt.3,v 1.17 2002/08/19 22:29:52 miod Exp $
 .\"
 .Dd April 19, 1994
 .Dt GETOPT 3
@@ -236,7 +236,7 @@ It is provided for backward compatibility
 .Em only .
 The following code fragment works in most cases.
 .Bd -literal -offset indent
-int length;
+long length;
 char *p;
 
 while ((c = getopt(argc, argv, "0123456789")) != -1) {