Wireshark relative ISN set incorrectly if raw ISN set to 0

This issue was migrated from bug 10713 in our old bug tracker.

Original bug information:

Reporter: Matthieu Coudron
Status: RESOLVED FIXED
Product: Wireshark
Component: Dissection engine (libwireshark)
OS: Ubuntu
Platform: x86
Version: 1.99.x (Experimental)

Attachments:

test-0-1.pcap: Enable tcp_relative_seq and look at the seq number of the 2nd packet.

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