Fix the bug

Signed-off-by: JCW <a1q123456@users.noreply.github.com>

src/xrpld/core/JobQueue.h

@@ -65,6 +65,7 @@ public:
     private:
         enum class CoroState { None, Suspended, Running, Finished };
 
+        std::atomic_bool exiting_ = false;
         detail::LocalValues lvs_;
         JobQueue& jq_;
         JobType type_;
@@ -76,8 +77,6 @@ public:
         boost::coroutines::asymmetric_coroutine<void>::pull_type coro_;
         boost::coroutines::asymmetric_coroutine<void>::push_type* yield_;
 
-        std::atomic_bool exiting_ = false;
-
     public:
         // Private: Used in the implementation
         template <class F>