Exit if unable to allocate buffer

wayland/buffers.c

@@ -57,6 +57,9 @@ static struct buffer *create_buffer(struct client_state *state, struct buffer *b
 
 	char *name;
 	int fd = create_pool_file(size, &name);
+	if (fd == -1) {
+		sway_abort("Unable to allocate buffer");
+	}
 	void *data = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
 	struct wl_shm_pool *pool = wl_shm_create_pool(state->shm, fd, size);
 	buf->buffer = wl_shm_pool_create_buffer(pool, 0, width, height, stride, format);