[Cbc] Problem when a solution is found by doHeuristicAtRoot

[Pierre Bonami]

Dear all,
I am having a problem when a solution is found by Cbc in the function
doHeuristicAtRoot in the trunk version.

Basically it seems that a resolve is missing somewhere. If a solution is
found by my heuristic at the root, Cbc always stops because
bestPossibleObjective_ computed line 15830 is equal to the value of the
solution found by the heuristic.If I add a resolve just before it seems to
work (this occurs when using Cbc in Bonmin).
Best regards,
Pierre
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