Try to fix LTO issue by adding virtual destructor

src/storm/solver/TopologicalMinMaxLinearEquationSolver.h

@@ -6,32 +6,35 @@
 #include "storm/storage/StronglyConnectedComponentDecomposition.h"
 
 namespace storm {
-    
+
     class Environment;
-    
+
     namespace solver {
-        
+
         template<typename ValueType>
         class TopologicalMinMaxLinearEquationSolver : public StandardMinMaxLinearEquationSolver<ValueType> {
         public:
             TopologicalMinMaxLinearEquationSolver();
             TopologicalMinMaxLinearEquationSolver(storm::storage::SparseMatrix<ValueType> const& A);
             TopologicalMinMaxLinearEquationSolver(storm::storage::SparseMatrix<ValueType>&& A);
-            
+
+            virtual ~TopologicalMinMaxLinearEquationSolver() {
+            }
+
             virtual void clearCache() const override;
 
             virtual MinMaxLinearEquationSolverRequirements getRequirements(Environment const& env, boost::optional<storm::solver::OptimizationDirection> const& direction = boost::none, bool const& hasInitialScheduler = false) const override ;
 
         protected:
-            
+
             virtual bool internalSolveEquations(storm::Environment const& env, OptimizationDirection d, std::vector<ValueType>& x, std::vector<ValueType> const& b) const override;
 
         private:
             storm::Environment getEnvironmentForUnderlyingSolver(storm::Environment const& env, bool adaptPrecision = false) const;
-            
+
             // Creates an SCC decomposition and sorts the SCCs according to a topological sort.
             void createSortedSccDecomposition(bool needLongestChainSize) const;
-            
+
             // Solves the SCC with the given index
             // ... for the case that the SCC is trivial
             bool solveTrivialScc(uint64_t const& sccState, OptimizationDirection d, std::vector<ValueType>& globalX, std::vector<ValueType> const& globalB) const;