[gtk] gl renderer: Fix scaled fallback node drawing

[Timm Bäder <baedert src gnome org>]

commit e838ea3bc813e8ab43397a1c7073613e56818e6f
Author: Timm Bäder <mail baedert org>
Date:   Sun Oct 6 17:45:54 2019 +0200

    gl renderer: Fix scaled fallback node drawing

 gsk/gl/gskglrenderer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gsk/gl/gskglrenderer.c b/gsk/gl/gskglrenderer.c
index eaa4a1b322..f42b6573c7 100644
--- a/gsk/gl/gskglrenderer.c
+++ b/gsk/gl/gskglrenderer.c
@@ -514,7 +514,7 @@ render_fallback_node (GskGLRenderer       *self,
   cairo_scale (cr, 1, -1);
   cairo_translate (cr, 0, -surface_height / scale);
   cairo_set_source_surface (cr, rendered_surface, 0, 0);
-  cairo_rectangle (cr, 0, 0, surface_width, surface_height);
+  cairo_rectangle (cr, 0, 0, surface_width / scale, surface_height / scale);
   cairo_fill (cr);
   cairo_restore (cr);