message: freeing the resulting str from duckdb_value_varchar
diff: @@ -438,6 +438,7 @@ TEST_CASE("Decimal -> Double casting issue", "[capi]") {
  REQUIRE(duckdb_value_double(&result, 0, 0) == (double)-0.5);
  auto str = duckdb_value_varchar(&result, 0, 0);
  REQUIRE(!strcmp(str, "-0.5"));
  + duckdb_free(str);
  duckdb_destroy_result(&result);
  duckdb_disconnect(&con);
  duckdb_close(&db);
  