properly cleanup if any of gstdroidcamsrcdev functions fail
properly cleanup if any of gstdroidcamsrcdev functions fail

sledges/gst-droid,sledges/gst-droid,mlehtima/gst-droid,mlehtima/gst-droid,sailfishos/gst-droid,foolab/gst-droid,sledges/gst-droid,foolab/gst-droid