bug fixes

include/c11log/details/flush_helper.h

@@ -16,7 +16,7 @@ public:
 
     file_flush_helper(const file_flush_helper&) = delete;
 
-    void write(const log_msg msg, std::ofstream& ofs)
+    void write(const log_msg& msg, std::ofstream& ofs)
     {
         auto buf = msg.formatted.buf();
         ofs.write(buf.data(), buf.size());

include/c11log/logger.h

@@ -114,7 +114,7 @@ inline c11log::logger::logger(const std::string& logger_name, const It& begin, c
 
 template <typename... Args>
 inline c11log::details::line_logger c11log::logger::log(level::level_enum lvl, const Args&... args) {
-    details::line_logger l(this, lvl, true);
+    details::line_logger l(this, lvl, should_log(lvl));
     _variadic_log(l, args...);
     return l;
 }