parse: silence is_pmt_ready() when !DBG

Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
output: dont memset the ringbuffer

Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>
parse: quiet down dvbpsi_class debug

Signed-off-by: Michael Ira Krufky <mkrufky@linuxtv.org>