osmo_util: define #pointcode{} record instead of manual 3-tuple

include/osmo_util.hrl

@@ -8,3 +8,10 @@
 	  spec_name :: prim_spec_name(),
 	  parameters
 	}).
+
+-type pointcode_repr() :: 'itu' | 'ansi' | 'ttc'.
+
+-record(pointcode, {
+	repr :: pointcode_repr(),
+	value
+}).

src/osmo_util.erl

@@ -143,8 +143,8 @@ make_prim(Subsys, GenName, SpecName, Param) ->
 		   spec_name = SpecName, parameters = Param}.
 
 % parse a 3-tuple pointcode into a raw integer
-pointcode2int({pointcode, Std, Param}) ->
-	pointcode2int(Std, Param);
+pointcode2int(#pointcode{repr=Type, value=Value}) ->
+	pointcode2int(Type, Value);
 pointcode2int({Std, Param}) ->
 	pointcode2int(Std, Param).