Fixed deault error handler not to use sink but write directly to stderr

include/spdlog/details/logger_impl.h

@@ -344,13 +344,11 @@ inline void spdlog::logger::_default_err_handler(const std::string &msg)
     {
         return;
     }
+    _last_err_time = now;
     auto tm_time = details::os::localtime(now);
     char date_buf[100];
     std::strftime(date_buf, sizeof(date_buf), "%Y-%m-%d %H:%M:%S", &tm_time);
-    details::log_msg err_msg;
-    err_msg.formatted.write("[*** LOG ERROR ***] [{}] [{}] [{}]{}", name(), msg, date_buf, details::os::default_eol);
-    sinks::stderr_sink_mt::instance()->log(err_msg);
-    _last_err_time = now;
+    fmt::print(stderr, "[*** LOG ERROR ***] [{}] [{}] {}\n", date_buf, name(), msg);
 }
 
 inline bool spdlog::logger::_should_flush_on(const details::log_msg &msg)