page: add canonical -W option

src/cmd/page/page.c

diff --git a/src/cmd/page/page.c b/src/cmd/page/page.c
index 47a7f32..32ba9c2 100644
--- a/src/cmd/page/page.c
+++ b/src/cmd/page/page.c
@@ -132,6 +132,9 @@
 	case 'i':
 		imagemode = 1;
 		break;
+	case 'W':
+		winsize = EARGF(usage());
+		break;
 	default:
 		usage();
 	}ARGEND;