Fix to compile against the Wayland v1.4 headers

src/video/wayland/SDL_waylanddyn.h

@@ -78,6 +78,7 @@ void SDL_WAYLAND_UnloadSymbols(void);
 #define wl_proxy_set_user_data (*WAYLAND_wl_proxy_set_user_data)
 #define wl_proxy_get_user_data (*WAYLAND_wl_proxy_get_user_data)
 #define wl_proxy_add_listener (*WAYLAND_wl_proxy_add_listener)
+#define wl_proxy_marshal_constructor (*WAYLAND_wl_proxy_marshal_constructor)
 
 #define wl_seat_interface (*WAYLAND_wl_seat_interface)
 #define wl_surface_interface (*WAYLAND_wl_surface_interface)

src/video/wayland/SDL_waylandsym.h

@@ -51,6 +51,10 @@ SDL_WAYLAND_SYM(int, wl_list_length, (const struct wl_list *))
 SDL_WAYLAND_SYM(int, wl_list_empty, (const struct wl_list *))
 SDL_WAYLAND_SYM(void, wl_list_insert_list, (struct wl_list *, struct wl_list *))
 
+/* These functions are available in Wayland >= 1.4 */
+SDL_WAYLAND_MODULE(WAYLAND_CLIENT_1_4)
+SDL_WAYLAND_SYM(void, wl_proxy_marshal_constructor, (uint32_t opcode, const struct wl_interface *interface, ...))
+
 SDL_WAYLAND_INTERFACE(wl_seat_interface)
 SDL_WAYLAND_INTERFACE(wl_surface_interface)
 SDL_WAYLAND_INTERFACE(wl_shm_pool_interface)