ffplay: do not update audio clock with old audio pts if current frame is AV_NOPTS_VALUE

Signed-off-by: Marton Balint <cus@passwd.hu>
ffplay: assume 0 stream start time if start time is unset in duration check

Fixes ticket #2103 and #2743.

Signed-off-by: Marton Balint <cus@passwd.hu>
MAINTAINERS: Update which releases are supported

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Merge remote-tracking branch 'cus/stable'

* cus/stable:
  ffplay: assume 0 stream start time if start time is unset in duration check
  ffplay: do not update audio clock with old audio pts if current frame is AV_NOPTS_VALUE

Merged-by: Michael Niedermayer <michaelni@gmx.at>