imsg.h requires sys/uio.h, ok deraadt

src/lib/libutil/imsg_init.3

@@ -1,4 +1,4 @@
-.\" $OpenBSD: imsg_init.3,v 1.2 2010/05/28 01:04:14 sthen Exp $
+.\" $OpenBSD: imsg_init.3,v 1.3 2010/10/31 17:33:33 nicm Exp $
 .\"
 .\" Copyright (c) 2010 Nicholas Marriott <nicm@openbsd.org>
 .\"
@@ -14,7 +14,7 @@
 .\" IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
 .\" OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 .\"
-.Dd $Mdocdate: May 28 2010 $
+.Dd $Mdocdate: October 31 2010 $
 .Dt IMSG_INIT 3
 .Os
 .Sh NAME
@@ -47,6 +47,7 @@
 .Sh SYNOPSIS
 .Fd #include <sys/types.h>
 .Fd #include <sys/queue.h>
+.Fd #include <sys/uio.h>
 .Fd #include <imsg.h>
 .Ft void
 .Fn imsg_init "struct imsgbuf *ibuf" "int fd"