[gnome-shell/gbsneto/content] util: Fix compiler warning

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 03c493088394589b2ef0b432e536c752fcd3f151
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Apr 18 15:38:01 2019 -0300

    util: Fix compiler warning
    
    A harmless warning due to meta_surface_actor_get_texture()
    now returning a pointer to MetaShapedTexture instead of
    ClutterActor.
    
    No functional changes.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/502

 src/shell-util.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)
---
diff --git a/src/shell-util.c b/src/shell-util.c
index 31bb18e70..5838d2327 100644
--- a/src/shell-util.c
+++ b/src/shell-util.c
@@ -430,7 +430,7 @@ ClutterContent *
 shell_util_get_content_for_window_actor (MetaWindowActor *window_actor,
                                          MetaRectangle   *window_rect)
 {
-  ClutterActor *texture;
+  MetaShapedTexture *texture;
   ClutterContent *content;
   cairo_surface_t *surface;
   cairo_rectangle_int_t clip;
@@ -453,8 +453,7 @@ shell_util_get_content_for_window_actor (MetaWindowActor *window_actor,
   clip.width = ceilf (window_rect->width * resource_scale);
   clip.height = ceilf (window_rect->height * resource_scale);
 
-  surface = meta_shaped_texture_get_image (META_SHAPED_TEXTURE (texture),
-                                           &clip);
+  surface = meta_shaped_texture_get_image (texture, &clip);
 
   content = clutter_canvas_new ();
   clutter_canvas_set_size (CLUTTER_CANVAS (content),