compositor: Always allow owner of pointer surface to change the hotspot

Make pointer_set_cursor() succeed if a client that doesn't have pointer
focus but is the owner of the current pointer surface calls it.

src/compositor.c

@@ -2173,23 +2173,27 @@ pointer_set_cursor(struct wl_client *client, struct wl_resource *resource,
 	struct weston_seat *seat = resource->data;
 	struct weston_surface *surface = NULL;
 
+	if (surface_resource)
+		surface = container_of(surface_resource->data,
+				       struct weston_surface, surface);
+
 	if (serial < seat->seat.pointer->focus_serial)
 		return;
+
+	if (surface && surface != seat->sprite) {
 		if (seat->seat.pointer->focus == NULL)
 			return;
 		if (seat->seat.pointer->focus->resource.client != client)
 			return;
 
-	if (surface_resource)
+		if (surface->configure) {
-		surface = container_of(surface_resource->data,
-				       struct weston_surface, surface);
-
-	if (surface && surface != seat->sprite && surface->configure) {
 			wl_resource_post_error(&surface->surface.resource,
 					       WL_DISPLAY_ERROR_INVALID_OBJECT,
-				       "surface->configure already set");
+					       "surface->configure already "
+					       "set");
 			return;
 		}
+	}
 
 	if (seat->sprite)
 		pointer_unmap_sprite(seat);