Include missing headers

azuresol · azuresol · commit b6a25659f61b · 2017-06-19T10:59:30.000-07:00
diff --git a/core/message.h b/core/message.h
@@ -2,6 +2,7 @@
 #define BESS_MESSAGE_H_
 
 #include <cstdarg>
+#include <functional>
 
 #include "bess_msg.pb.h"
 #include "error.pb.h"
