Merge pull request #890 from rwen2012/v1.x

change the log_msg&& to log_msg&

include/spdlog/details/async_logger_impl.h

@@ -43,7 +43,7 @@ inline void spdlog::async_logger::sink_it_(details::log_msg &msg)
 #endif
     if (auto pool_ptr = thread_pool_.lock())
     {
-        pool_ptr->post_log(shared_from_this(), std::move(msg), overflow_policy_);
+        pool_ptr->post_log(shared_from_this(), msg, overflow_policy_);
     }
     else
     {

include/spdlog/details/thread_pool.h

@@ -70,7 +70,7 @@ struct async_msg
 #endif
 
     // construct from log_msg with given type
-    async_msg(async_logger_ptr &&worker, async_msg_type the_type, details::log_msg &&m)
+    async_msg(async_logger_ptr &&worker, async_msg_type the_type, details::log_msg &m)
         : msg_type(the_type)
         , level(m.level)
         , time(m.time)
@@ -154,9 +154,9 @@ public:
     thread_pool(const thread_pool &) = delete;
     thread_pool &operator=(thread_pool &&) = delete;
 
-    void post_log(async_logger_ptr &&worker_ptr, details::log_msg &&msg, async_overflow_policy overflow_policy)
+    void post_log(async_logger_ptr &&worker_ptr, details::log_msg &msg, async_overflow_policy overflow_policy)
     {
-        async_msg async_m(std::move(worker_ptr), async_msg_type::log, std::move(msg));
+        async_msg async_m(std::move(worker_ptr), async_msg_type::log, msg);
         post_async_msg_(std::move(async_m), overflow_policy);
     }