Do not add Images with invalid geometry to the scene graph.

Task-number: QTBUG-35656
Task-number: QTBUG-36050

Change-Id: Iea2d5303bdeb9c523e59ebcdc9f97288060be022
Reviewed-by: Shawn Rutledge <shawn.rutledge@digia.com>
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
 Don't try to draw shader effect sources with dims < 0.

Task-number: QTBUG-40099
Change-Id: I0eb0d877963a9394765ec8e0f10569a98a263743
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Merge pull request #43 from rainemak/select-invalid-geometry-fixes

[qtdeclarative] Select invalid geometry fixes