Fix misc. warnings

Author: MisterDA

samples/gi_baseinfo_get_type.ml

@@ -38,7 +38,7 @@ let print_info namespace n =
 
 let () =
   let namespace = "Gtk" in
-  let _ = Repository.require namespace in
+  let _ = Repository.require namespace () in
   let n = Repository.get_n_infos namespace in
   for i = 0 to n - 1 do
     print_info namespace i

tests/Test_function_info.ml

@@ -36,7 +36,7 @@ let test_function_info namespace name fn =
   | Some info -> fn info
 
 let namespace = "GObject"
-let typelib = Repository.require namespace ()
+let _typelib = Repository.require namespace ()
 let name = "signal_name"
 
 let test_get_symbol _ =