css: Fix compiler warning

...

diff --git a/gtk/gtkcssimagescaled.c b/gtk/gtkcssimagescaled.c
index 09166e884c6840a317034a1510279d44c439fc58..14108845f16bb3a187c985b10fde51737d5ee304 100644 (file)
--- a/gtk/gtkcssimagescaled.c
+++ b/gtk/gtkcssimagescaled.c
@@ -140,7 +140,7 @@ gtk_css_image_scaled_compute (GtkCssImage      *image,
                                            parent_style);
   res->scales[0] = scaled->scales[best];
 
-  return res;
+  return GTK_CSS_IMAGE (res);
 }