werror.opts: enable osmo-iuh

It builds without warnings now \o/

Related: OS#4462
Change-Id: Ie974632462aab755d73e1345ebc9a08eb2d80893
diff --git a/werror.opts b/werror.opts
index 1e7079a..7252af9 100644
--- a/werror.opts
+++ b/werror.opts
@@ -9,7 +9,7 @@
 osmo-bsc --enable-werror
 osmo-ggsn --enable-werror
 osmo-hlr --enable-werror
-#osmo-iuh --enable-werror
+osmo-iuh --enable-werror
 osmo-mgw --enable-werror
 osmo-msc --enable-werror
 osmo-sgsn --enable-werror