refs #140, removed MACRO DBUS_ENUM_MARSHALLING, changed to template

discussed in https://dev.vatsim-germany.org/issues/140#change-864

src/blackmisc/aviocomsystem.cpp

@@ -3,6 +3,7 @@
  *  License, v. 2.0. If a copy of the MPL was not distributed with this
  *  file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
+#include "blackmisc/blackmiscfreefunctions.h"
 #include "blackmisc/aviocomsystem.h"
 
 using namespace BlackMisc::PhysicalQuantities;