[Cbc] model->secondaryStatus()

[John Forrest]

Ivan,

It was a bug with a one line fix.  Fixed in 2.8 and will be fixed in 
trunk next time I commit anything.

If you are using a different version just look at change set for 1878

in CbcModel.cpp

  #ifdef COIN_HAS_CLP
      if (clpSolver && !feasible) {
-        // make sure marked infeasible
+      // make sure marked infeasible
+      if (!clpSolver->isProvenDualInfeasible())
          clpSolver->getModelPtr()->setProblemStatus(1);
      }
  #endif

John Forrest