libqt4: fix cirrus driver issues
libqt4 was updated to fix the following bug:
When extracting a region of a QRasterPixmapData an optimization
was using the wrong bit depth for some calculations thus copying
a different section of the image than requested. This breaks
specially the oxygen kde theme under qemu when using a cirrus driver.
- Submitted by Antonio Larrosa (alarrosa)
Fixed bugs
bnc#847880
kde/qt rendering error in qemu cirrus i586