minor fixes

include/c11log/sinks/base_sink.h

@@ -45,10 +45,17 @@ protected:
 
 class null_sink:public base_sink
 {
+public:
+	static std::shared_ptr<null_sink>& get()
+	{
+		static auto inst = std::make_shared<null_sink>();
+		return inst;
+	}
 protected:
     void _sink_it(const details::log_msg&) override
-    {
-    }
+    {}
 };
+
+
 }
 }

include/c11log/sinks/console_sinks.h

@@ -18,6 +18,7 @@ public:
     console_sink& operator=(const console_sink&) = delete;
     virtual ~console_sink() = default;
 
+
 protected:
     virtual void _sink_it(const details::log_msg& msg) override
     {
@@ -42,6 +43,5 @@ inline std::shared_ptr<console_sink>& stderr_sink ()
     return inst;
 }
 
-
 }
 }