Work around badly chosen argument name in giomm/dbusmessage.h

interface is defined in windows/mingw headers. hopefully this will
be fixed in giomm at some point and this crap can be removed

gtk2_ardour/export_video_infobox.cc

@@ -18,6 +18,9 @@
 
 */
 #include "ardour/session.h"
+#ifdef interface
+#undef interface
+#endif
 #include "export_video_infobox.h"
 #include "i18n.h"
 

gtk2_ardour/video_server_dialog.cc

@@ -29,6 +29,10 @@
 #include "ardour/template_utils.h"
 #include "ardour/session.h"
 
+#ifdef interface
+#undef interface
+#endif
+
 #include "video_server_dialog.h"
 #include "utils_videotl.h"
 #include "i18n.h"

libs/gtkmm2ext/gtkmm2ext/gtk_ui.h

@@ -27,6 +27,10 @@
 #include <setjmp.h>
 #include <pthread.h>
 
+#ifdef interface
+#undef interface
+#endif
+
 #include <glibmm/thread.h>
 
 #include <gtkmm/widget.h>