add map_codec wrapper module to be consistent with isup/sccp and other code
diff --git a/ebin/osmo_map.app b/ebin/osmo_map.app
index cc054ed..b1d5f14 100644
--- a/ebin/osmo_map.app
+++ b/ebin/osmo_map.app
@@ -1,7 +1,7 @@
 {application, osmo_map,
 	[{description, "Osmocom SS7 MAP"},
 	 {vsn, "1"},
-	 {modules, [map]},
+	 {modules, [map, map_codec]},
 	 {registered, []},
 	 {mod, {map, []}},
 	 {applications, []},