QPSQLDriver - does not format QDateTime as Qt::ISODate

while executing an sql query, the postgres driver plugin is writing a QDateTime field to db, formatted like this:

'2013-9-8 22:15:17.239'

see QPSQLDriver::formatValue()

Later, when reading same value from db, driver expects value as Qt::ISODate, which needs 0 padding for month/day etc

see QPSQLResult::data()

Since day, month are not padded, empty value is returned from postgres driver plugin