Original commit message from CVS:

* po/POTFILES.in:
add dvbsrc
* sys/dvb/gstdvbsrc.c: (gst_dvbsrc_class_init), (gst_dvbsrc_init),
(gst_dvbsrc_set_property), (gst_dvbsrc_get_property),
(gst_dvbsrc_open_frontend), (gst_dvbsrc_open_dvr),
(gst_dvbsrc_finalize), (read_device), (gst_dvbsrc_create),
(gst_dvbsrc_start), (gst_dvbsrc_frontend_status),
(gst_dvbsrc_tune), (gst_dvbsrc_unset_pes_filters),
(gst_dvbsrc_set_pes_filter):
* sys/dvb/gstdvbsrc.h:
adapter-prefix is a terrible name for a device, so replace it.
strerror should be used immediately after the syscall related to it.
Actually throw a reasonable GST_ELEMENT_ERROR if we fail to open
(pretty easy to trigger by opening the same device twice).
Use _OBJECT macros where it makes sense.
This element is going to need some work before it moves.