fixing minor compiling issue

src/storm/models/sparse/NondeterministicModel.cpp

@@ -51,19 +51,21 @@ namespace storm {
             
             template<typename ValueType, typename RewardModelType>
             std::shared_ptr<storm::models::sparse::Model<ValueType, RewardModelType>> NondeterministicModel<ValueType, RewardModelType>::applyScheduler(storm::storage::Scheduler<ValueType> const& scheduler, bool dropUnreachableStates) {
-                boost::optional<storm::storage::SparseModelMemoryProduct<ValueType>> memoryProduct;
                 if (scheduler.isMemorylessScheduler()) {
-                    storm::storage::MemoryStructure memStruct = storm::storage::MemoryStructureBuilder<ValueType, RewardModelType>::buildTrivialMemoryStructure(*this);
-                    memoryProduct = memStruct.product(*this);
+                    auto memoryProduct = storm::storage::MemoryStructureBuilder<ValueType, RewardModelType>::buildTrivialMemoryStructure(*this).product(*this);
+                    if (!dropUnreachableStates) {
+                        memoryProduct.setBuildFullProduct();
+                    }
+                    return memoryProduct.build(scheduler);
                 } else {
                     boost::optional<storm::storage::MemoryStructure> const& memStruct = scheduler.getMemoryStructure();
                     STORM_LOG_ASSERT(memStruct, "Memoryless scheduler without memory structure.");
-                    memoryProduct = memStruct->product(*this);
-                }
-                if (!dropUnreachableStates) {
-                    memoryProduct->setBuildFullProduct();
+                    auto memoryProduct = memStruct->product(*this);
+                    if (!dropUnreachableStates) {
+                        memoryProduct.setBuildFullProduct();
+                    }
+                    return memoryProduct.build(scheduler);
                 }
-                return memoryProduct->build(scheduler);
             }
             
             template<typename ValueType, typename RewardModelType>