qtcamera: fix null pointer dereference when generating dynamic resolutions
qtcamera: fix null pointer dereference when generating dynamic resolutions

mer-hybris-kis3/cameraplus,foolab/cameraplus,mer-hybris-kis3/cameraplus,foolab/cameraplus,mer-hybris-kis3/cameraplus,foolab/cameraplus,foolab/cameraplus,mer-hybris-kis3/cameraplus