ext/mythtv/gstmythtvsrc.c: Don't allocate and copy the data to a new place but instead put the data from gmyth (which...

Original commit message from CVS:
* ext/mythtv/gstmythtvsrc.c: (gst_mythtv_src_create):
Don't allocate and copy the data to a new place but instead
put the data from gmyth (which we own) into the buffers that
are passed downstream.