Rewrite the last legacy catch in inet_db

Author: RaimoNiskanen

lib/kernel/src/inet_db.erl

@@ -285,13 +285,12 @@ add_rc(File) ->
 	Error -> Error
     end.
 
-%% Add an inetrc binary term must be a rc list
+%% Add an inetrc binary term that must be an rc list
 add_rc_bin(Bin) ->
-    case catch binary_to_term(Bin) of
-	List when is_list(List) ->
-	    add_rc_list(List);
-	_ ->
-	    {error, badarg}
+    try binary_to_term(Bin) of
+	List when is_list(List)     -> add_rc_list(List);
+        _                           -> {error, badarg}
+    catch error : _                 -> {error, badarg}
     end.
 
 add_rc_list(List) -> call({add_rc_list, List}).