fix access to free()d memory

the 'item' reference may become invalid inside the loop.

Change-Id: I4468b1dc67e565e2eb8ce35268ef44b18142846a
Reviewed-on: http://codereview.qt.nokia.com/1703


Reviewed-by: Daniel Teske <daniel.teske@nokia.com>
Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>