MINIFICPP-2669 - Fix build

Author: adamdebreceni

extensions/rocksdb-repos/FlowFileLoader.h

@@ -51,7 +51,7 @@ class FlowFileLoader {
  private:
   utils::TaskRescheduleInfo loadImpl(const std::vector<SwappedFlowFile>& flow_files, const std::shared_ptr<std::promise<FlowFilePtrVec>>& output);
 
-  utils::ThreadPool thread_pool_{thread_count_, nullptr, "FlowFileLoaderThreadPool"};
+  utils::ThreadPool thread_pool_{thread_count_, "FlowFileLoaderThreadPool"};
 
   gsl::not_null<minifi::internal::RocksDatabase*> db_;