[gtk] gl renderer: Avoid copying a rect

[Timm Bäder <baedert src gnome org>]

commit 1caa95b8148a27c73b7db42295ba85b1420eb56a
Author: Timm Bäder <mail baedert org>
Date:   Fri Oct 11 21:49:13 2019 +0200

    gl renderer: Avoid copying a rect

 gsk/gl/gskglrenderer.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index 531e145d62..f46542c74b 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -1085,13 +1085,13 @@ render_clip_node (GskGLRenderer   *self,
                   GskRenderNode   *node,
                   RenderOpBuilder *builder)
 {
+  const graphene_rect_t *clip = gsk_clip_node_peek_clip (node);
   GskRenderNode *child = gsk_clip_node_get_child (node);
   graphene_rect_t transformed_clip;
   graphene_rect_t intersection;
   GskRoundedRect child_clip;
 
-  transformed_clip = *gsk_clip_node_peek_clip (node);
-  ops_transform_bounds_modelview (builder, &transformed_clip, &transformed_clip);
+  ops_transform_bounds_modelview (builder, clip, &transformed_clip);
 
   graphene_rect_intersection (&transformed_clip,
                               &builder->current_clip->bounds,