QFtp forgets to call tr()

Look at API:
QFtpPrivate::_q_piError in file qftp.cpp
All the strings in this function use QT_TRANSLATE_NOOP while they should use QFtp::tr instead.
Result: nothing gets translated at run time, despite the fact that the qt_*.qm contain the text!
The equivalent API "Q3Ftp::piError" does not have this error.