QNX: Fix compilation with Qt 4.

Introduced by b254313c686d07057acba243198100e49159e6e5 .

Change-Id: Ib1b41da58eef97f5fe961ca12bcfcabeae4fd523
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Orgad Shaneh <orgads@gmail.com>