message: support case stmt
diff: @@ -288,6 +288,7 @@ UHDM::atomic_stmt* CompileHelper::compileCaseStmt(FileContent* fC, NodeId nodeId
  if (fC->Type(Expression) == VObjectType::slExpression) {
  // Expr
  UHDM::any* item_exp = compileExpression(fC, Expression, compileDesign);
  + if (item_exp)
  exprs->push_back(item_exp);
  } else {
  // Stmt
  