- do not add variables with stateSelect=StateSelect.prefer to states

- update testsuite

git-svn-id: https://openmodelica.org/svn/OpenModelica/trunk@8708 f25d12d1-65f4-0310-ae8a-bbce733d8d8e

Author: Jens Frenkel

Compiler/BackEnd/BackendDAECreate.mo

@@ -726,12 +726,6 @@ algorithm
       states = BackendDAEUtil.treeAdd(states, v, 0);
     then (BackendDAE.STATE(),states);
 
-    // Or states have StateSelect.prefer
-    case (DAE.VARIABLE(),_,v,_,_,_,states,SOME(DAE.VAR_ATTR_REAL(stateSelectOption = SOME(DAE.PREFER()))))
-      equation
-      states = BackendDAEUtil.treeAdd(states, v, 0);
-    then (BackendDAE.STATE(),states);
-
     case (DAE.VARIABLE(),(DAE.T_BOOL(_),_),cr,dir,flowPrefix,_,states,_)
       equation
         failure(BackendVariable.topLevelInput(cr, dir, flowPrefix));