Change in libosmocore[master]: conv: Fix the traceback for tail biting codes

[tnt]

Hello Jenkins Builder, laforge, 

I'd like you to reexamine a change. Please visit

    https://gerrit.osmocom.org/c/libosmocore/+/26657

to look at the new patch set (#2).

Change subject: conv: Fix the traceback for tail biting codes
......................................................................

conv: Fix the traceback for tail biting codes

When picking the end state, looking only at the path metric
is highly suboptimal because in a tail biting code, we _know_ that
whatever treillis path is correct, it must start and end at the same
state. So we only consider path meeting that condition. We know any
path that doesn't isn't the right one. We only fallback to only
path metric if no path met that condition.

Fixes OS#4508

Signed-off-by: Sylvain Munaut <tnt at 246tNt.com>
Change-Id: I87e51d3880c0fe7bf3d6cd08fd46517a424a230c
---
M include/osmocom/core/conv.h
M src/conv.c
M src/conv_acc.c
3 files changed, 93 insertions(+), 24 deletions(-)


  git pull ssh://gerrit.osmocom.org:29418/libosmocore refs/changes/57/26657/2
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Gerrit-Project: libosmocore
Gerrit-Branch: master
Gerrit-Change-Id: I87e51d3880c0fe7bf3d6cd08fd46517a424a230c
Gerrit-Change-Number: 26657
Gerrit-PatchSet: 2
Gerrit-Owner: tnt <tnt at 246tNt.com>
Gerrit-Reviewer: Jenkins Builder
Gerrit-Reviewer: laforge <laforge at osmocom.org>
Gerrit-CC: pespin <pespin at sysmocom.de>
Gerrit-MessageType: newpatchset
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