Q3Datatable Qt3 support class never shows results that contain only one row

#include <QtGui>
#include <QtSql>
#include <Q3DataTable>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);

    QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
    db.setDatabaseName(":memory:");
    if (!db.open()) {
        QMessageBox::critical(0, qApp->tr("Cannot open database"),
                              qApp->tr("Unable to establish a database connection.\n"
                                       "This example needs SQLite support. Please read "
                                       "the Qt SQL driver documentation for information how "
                                       "to build it.\n\n"
                                       "Click Cancel to exit."), QMessageBox::Cancel);
        return 1;
    }

    QSqlQuery query;
    query.exec("create table person (id int primary key, "
               "firstname varchar(20), lastname varchar(20))");
    query.exec("insert into person values(101, 'Danny', 'Young')");
//    query.exec("insert into person values(102, 'Christine', 'Holand')");
//    query.exec("insert into person values(103, 'Lars', 'Gordon')");
//    query.exec("insert into person values(104, 'Roberto', 'Robitaille')");
//    query.exec("insert into person values(105, 'Maria', 'Papadopoulos')");

    query.exec("create table offices (id int primary key,"
               "imagefile int,"
               "location varchar(20),"
               "country varchar(20),"
               "description varchar(100))");

    Q3SqlCursor cursor("person", true, db);
    cursor.select();
    Q3DataTable dataTable(&cursor, true);

    dataTable.show();
    dataTable.refresh();

    return app.exec();
}