QStaticText does not handle multi-length strings

See also: https://projects.maemo.org/bugzilla/show_bug.cgi?id=177184

Reported by Jörgen Scheibengruber, quoted here for convenience:

SOFTWARE VERSION: 4.7.0~git20100614-0maemo1+0m6

STEPS LEADING TO PROBLEM:
1. Render a multi-length string using QPainter::drawStaticText()
2. Render the same text using QPainter::drawText()

EXPECTED OUTCOME: No difference

ACTUAL OUTCOME: In 1. all substrings including the separator are rendered, in
2. only the appropriate substring is rendered

FREQUENCY OF OCCURRENCE:
always