viewporter: hide wlr_viewport

This is an internal struct.

include/wlr/types/wlr_viewporter.h

@@ -32,14 +32,6 @@ struct wlr_viewporter {
 	struct wl_listener display_destroy;
 };
 
-struct wlr_viewport {
-	struct wl_resource *resource;
-	struct wlr_surface *surface;
-
-	struct wl_listener surface_destroy;
-	struct wl_listener surface_commit;
-};
-
 struct wlr_viewporter *wlr_viewporter_create(struct wl_display *display);
 
 #endif

types/wlr_viewporter.c

@@ -8,6 +8,14 @@
 
 #define VIEWPORTER_VERSION 1
 
+struct wlr_viewport {
+	struct wl_resource *resource;
+	struct wlr_surface *surface;
+
+	struct wl_listener surface_destroy;
+	struct wl_listener surface_commit;
+};
+
 static const struct wp_viewport_interface viewport_impl;
 
 // Returns NULL if the viewport is inert