Fix transform_iterator thingamajig

Former-commit-id: 38313193b6

src/storage/jani/VariableSet.cpp

@@ -10,7 +10,7 @@ namespace storm {
         namespace detail {
             
             template<typename VariableType>
-            VariableType& Dereferencer<VariableType>::operator()(std::shared_ptr<VariableType> const& d) {
+            VariableType& Dereferencer<VariableType>::operator()(std::shared_ptr<VariableType> const& d) const {
                 return *d;
             }
             

src/storage/jani/VariableSet.h

@@ -19,7 +19,7 @@ namespace storm {
             template<typename VariableType>
             class Dereferencer {
             public:
-                VariableType& operator()(std::shared_ptr<VariableType> const& d);
+                VariableType& operator()(std::shared_ptr<VariableType> const& d) const;
             };
             
             template<typename VariableType>

src/storage/prism/HidingComposition.h

@@ -3,6 +3,7 @@
 
 #include <set>
 #include <string>
+#include <memory>
 
 #include "src/storage/prism/Composition.h"
 

src/storage/prism/RenamingComposition.h

@@ -1,6 +1,7 @@
 #ifndef STORM_STORAGE_PRISM_RENAMINGCOMPOSITION_H_
 #define STORM_STORAGE_PRISM_RENAMINGCOMPOSITION_H_
 
+#include <memory>
 #include <string>
 #include <map>
 #include <boost/optional.hpp>