Commit
e01f6e7f3333c35e3d9677191a9e7fa92d1407b5
by Pau Espin Pedroliuup: Increment RTP hdr seqnr even if Tx over UDP fails
This way holes can be detected. In practice it's not much important
since it would be really strange that UDP fails for a while and then it
starts working out of the blue...
Related: SYS#6907
Change-Id: I8095f3505c859650c0b83abce405067bef745975