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

libs/gtkmm2ext/gtkmm2ext/auto_spin.h

@@ -20,6 +20,10 @@
 #ifndef __gtkmm2ext_auto_spin_h__
 #define __gtkmm2ext_auto_spin_h__
 
+#ifdef interface
+#undef interface
+#endif
+
 #include <gtkmm.h>
 
 namespace Gtkmm2ext {

libs/gtkmm2ext/gtkmm2ext/click_box.h

@@ -20,6 +20,10 @@
 #ifndef __gtkmm2ext_click_box_h__
 #define __gtkmm2ext_click_box_h__
 
+#ifdef interface
+#undef interface
+#endif
+
 #include <string>
 #include <gtkmm.h>
 

libs/gtkmm2ext/gtkmm2ext/doi.h

@@ -20,6 +20,10 @@
 #ifndef __ardour_gtk_doi_h__
 #define __ardour_gtk_doi_h__
 
+#ifdef interface
+#undef interface
+#endif
+
 #include <gtkmm.h>
 
 /* XXX g++ 2.95 can't compile this as pair of member function templates */

libs/gtkmm2ext/gtkmm2ext/popup.h

@@ -20,6 +20,10 @@
 #ifndef __qui_popup_h__
 #define __qui_popup_h__
 
+#ifdef interface
+#undef interface
+#endif
+
 #include <string>
 #include <gtkmm.h>
 

libs/gtkmm2ext/gtkmm2ext/selector.h

@@ -19,6 +19,10 @@
 #ifndef __gtkselector_h__
 #define __gtkselector_h__
 
+#ifdef interface
+#undef interface
+#endif
+
 #include <string>
 #include <vector>
 

libs/gtkmm2ext/gtkmm2ext/slider_controller.h

@@ -19,6 +19,10 @@
 #ifndef __gtkmm2ext_slider_controller_h__
 #define __gtkmm2ext_slider_controller_h__
 
+#ifdef interface
+#undef interface
+#endif
+
 #include <gtkmm.h>
 #include <gtkmm2ext/popup.h>
 #include <gtkmm2ext/pixfader.h>