Glib warning: GstOmxMDeiScaler has no property 'crop-area'

[oskirby]

When built for Arago, a warning is observed in the debug logs about a missing 'crop-area' property in the video scaler element. This is being used for the videoZoom property to increase the scaling of the video, but shouldn't actually be used on Arago. This warning is most certainly due to the Gstreamer/OMX elements on Arago being built without that feature.

We should add a check to disable this feature when built for Arago.

(cam-pipeline:3457): GLib-GObject-WARNING **: IA__g_object_set_valist: object class GstOmxMDeiScaler' has no property named crop-area'