reordered members definition in async_log_helper to prevent gcc warning

example/example.cpp

@@ -38,7 +38,8 @@ int main(int, char* [])
 
         // Create console, multithreaded logger
         auto console = spd::stdout_logger_mt("console");
-        console->info("Welcome to spdlog!") ;
+        const std::string s("Hello {}", 1);
+        console->info(s) ;
         console->info("An info message example {}..", 1);
         console->info() << "Streams are supported too  " << 1;
 

include/spdlog/details/async_log_helper.h

@@ -109,7 +109,12 @@ public:
     using clock = std::chrono::steady_clock;
 
 
-    async_log_helper(formatter_ptr formatter, const std::vector<sink_ptr>& sinks, size_t queue_size, const async_queue_overflow_policy overflow_policy = async_queue_overflow_policy::block_retry, const std::function<void()>& worker_warmup_cb = nullptr);
+    async_log_helper(formatter_ptr formatter,
+    	const std::vector<sink_ptr>& sinks, 
+    	size_t queue_size, 
+    	const async_queue_overflow_policy overflow_policy = async_queue_overflow_policy::block_retry,
+    	const std::function<void()>& worker_warmup_cb = nullptr);
+    	
     void log(const details::log_msg& msg);
 
     //Stop logging and join the back thread
@@ -120,9 +125,10 @@ public:
 private:
     formatter_ptr _formatter;
     std::vector<std::shared_ptr<sinks::sink>> _sinks;
+    
+    // queue of messages to log
     q_type _q;
-    std::thread _worker_thread;
-
+    
     // last exception thrown from the worker thread
     std::shared_ptr<spdlog_ex> _last_workerthread_ex;
 
@@ -131,8 +137,10 @@ private:
 
     // worker thread warmup callback - one can set thread priority, affinity, etc
     const std::function<void()> _worker_warmup_cb;
-
-
+	
+	// worker thread	
+	std::thread _worker_thread;
+	
     // throw last worker thread exception or if worker thread is not active
     void throw_if_bad_worker();