Remove the last call to Gecode::Gist

Gist is the Gecode Interactive Search Tool, using Qt to display a GUI.

src/solvers/csp/TransportNetwork.cpp

@@ -1842,7 +1842,7 @@ void TransportNetwork::postRoleAssignments()
  // to draw system by supply demand
  //branchTimelines(*this, mTimelines, mSupplyDemand);
  Gecode::branch(*this,&TransportNetwork::doPostMinCostFlow);
- Gecode::Gist::stopBranch(*this);
+ //Gecode::Gist::stopBranch(*this);
 }