graphicsscene_test.py: Fix calls to itemAt
graphicsscene_test.py: Fix calls to itemAt

itemAt requires a QTransform parameter.

Change-Id: Ibe7b58b566bc42a32f39e9af06882a7dce9f70c4
Reviewed-by: Christian Tismer <3f32342346a37828fd9c8841ea4579d28b46cf08@stackless.com>

qtproject/pyside-pyside,qtproject/pyside-pyside,qtproject/pyside-pyside,qtproject/pyside-pyside,qtproject/pyside-pyside