m_accessUnitPicInfo may be empty in DecLib::checkLayerIdIncludedInCvss()
when the bitstream ends after skipping pictures.
m_accessUnitPicInfo.begin() is undefined in that case.

Move the codes related to marking pics not to be outputted to location later after the value of NoOutputBeforeRecoveryFlag has been derived.

Add the check on value of NoOutputBeforeRecoveryFlag to the existing if condition

Update the check if the picture is CRA to be the check if the current picture is an IRAP.

Applying no output of prior pics flag only once per Au

Improve fix: now merge splitting works correctly for independent layers, even those not including layer 0.

This reverts commit 9eca063e.

: Addition of deallocation of MVP SEI
: Removal of unnecessary editorial mistakes

Uses the parameters sets of the current picture instead of first found.