[sr-dev] [kamailio/kamailio] Kamailio 5.1.8, error in sdpops, sdp_keep_codecs function (#1983)

[Henning Westerholt]

The issue is related to the function call sdp_keep_codecs_by_id(..).
It seems to not remove multiple "a=fmtp" lines related to a removed codec. Shortened example:
`
m=audio 15684 RTP/AVP 8 18 4 0 101 13
a=fmtp:18 annexa=yes
a=fmtp:18 annexb=no
`

The resulting SDP that cause the error message is then this:
 `
v=0
o=- 7292 1 IN IP4 192.168.50.50
s=-
t=0 0
m=audio 18466 RTP/AVP 8 101
c=IN IP4 XXX.XXX.XXX.XXX
a=rtpmap:101 telephone-event/8000
a=fmtp:18 annexa=yes
a=fmtp:101 0-15
a=ptime:30
a=silenceSupp:off - - - -
a=sendrecv
`

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