Fix typo in imsg_init.3

[Ben Cornett]

This fixes a typo in the imsg example.



Index: lib/libutil/imsg_init.3
===================================================================
RCS file: /repo/OpenBSD/src/lib/libutil/imsg_init.3,v
retrieving revision 1.12
diff -u -p -u -r1.12 imsg_init.3
--- lib/libutil/imsg_init.3     11 Jun 2015 19:25:53 -0000      1.12
+++ lib/libutil/imsg_init.3     10 Jul 2015 16:39:32 -0000
@@ -476,7 +476,7 @@ function:
 enum imsg_type {
        IMSG_A_MESSAGE,
        IMSG_MESSAGE2
-}
+};
 
 int
 child_main(struct imsgbuf *ibuf)