demux/ts.c: Do not lead dvbpsi_pmt_t pointers.

Always call dvbpsi_DeletePMT(p_pmt) on a PMT callback. Otherwise the
struct is never released.

modules/demux/ts.c

@@ -4354,6 +4354,8 @@ static void PMTCallBack( demux_t *p_demux, dvbpsi_pmt_t *p_pmt )
     if( !ProgramIsSelected( p_demux, prg->i_number )
      || stream_Control( p_demux->s, STREAM_CONTROL_ACCESS,
                         ACCESS_SET_PRIVATE_ID_CA, p_pmt ) != VLC_SUCCESS )
+        msg_Warn( p_demux, "Setting descrambling failed" );
+
     dvbpsi_DeletePMT( p_pmt );
 
     for( int i = 0; i < i_clean; i++ )