RSNHandshakeCapturer is now DefaultConstructible.

include/handshake_capturer.h

@@ -50,6 +50,11 @@ namespace Tins {
         typedef std::vector<T> container_type;
         typedef HWAddress<6> address_type;
         
+        /**
+         * \brief Default constructor.
+         */
+        EAPOLHandshake() { }
+
         /**
          * Constructs an EAPOLHandshake object.
          *