message: Actually check memory counter values in test
diff: @@ -31,15 +31,20 @@ TEST_CASE("Test using a custom allocator", "[api]") {
  Allocator my_allocator(my_allocate_function, my_free_function, make_unique<MyAllocateData>(&memory_counter));
  + REQUIRE(memory_counter.load() == 0);
  +
  DBConfig config;
  config.allocator = move(my_allocator);
  DuckDB db(nullptr, &config);
  Connection con(db);
  REQUIRE_NO_FAIL(con.Query("CREATE TABLE tbl AS SELECT * FROM range(1000000)"));
  - // printf("\nMemory usage: %lld\n", memory_counter.load());
  + // check that the memory counter reported anything
  + REQUIRE(memory_counter.load() > 0);
  + auto table_memory_usage = memory_counter.load();
  REQUIRE_NO_FAIL(con.Query("DROP TABLE tbl"));
  - // printf("\nMemory usage: %lld\n", memory_counter.load());
  + // check that the memory counter usage has decreased after we dropped the table
  + REQUIRE(memory_counter.load() < table_memory_usage);
  }
  