#395 PD subscriber statistics when publisher start earlier

[Kari Keinanen]

If publisher starts before subscriber, publisher can send multiple messages before subscriber is alive.
This cause subscriber's missed messages counter to jump in the beginning.

Proposal:

• subscriber could adapt to sequence counter of the first received message (instead of expecting sequence counter 0)

[Kari Keinanen]

Could we change the code like below, trdp_pdcom.c

896 if ((newSeqCnt > 0u) && (newSeqCnt > (pExistingElement->curSeqCnt + 1u)))
-> if ((newSeqCnt > 0u) && (newSeqCnt > (pExistingElement->curSeqCnt + 1u)) && (pExistingElement->numRxTx > 0))

And increase missed frames counter only if subscriber has received some frame.