message: Allow passing null_ptr value to SQLSetStmtAttr.
diff: SQLRETURN SQLSetStmtAttr(SQLHSTMT statement_handle, SQLINTEGER attribute, SQLPOINTER value_ptr,
  SQLINTEGER string_length) {
  return duckdb::WithStatement(statement_handle, [&](duckdb::OdbcHandleStmt *stmt) {
  - if (!value_ptr) {
  - return SQL_ERROR;
  - }
  switch (attribute) {
  case SQL_ATTR_PARAMSET_SIZE: {
  /* auto size = Load<SQLLEN>((data_ptr_t) value_ptr);
  