[gtk+] cssshadowvalue: don't apply the y_scale offset twice to the shadow

[Matthias Clasen <matthiasc src gnome org>]

commit 29f36fed085d51bad16ec0e3f7ba5085bf9f82e8
Author: Marco Trevisan (Treviño) <mail 3v1n0 net>
Date:   Thu Dec 7 17:00:01 2017 -0500

    cssshadowvalue: don't apply the y_scale offset twice to the shadow
    
    As per commit 942e904 this changed causing a regression that
    seems to be visible only when scale > 2.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=791363

 gtk/gtkcssshadowvalue.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtkcssshadowvalue.c b/gtk/gtkcssshadowvalue.c
index f29d403..c81d82b 100644
--- a/gtk/gtkcssshadowvalue.c
+++ b/gtk/gtkcssshadowvalue.c
@@ -361,7 +361,7 @@ gtk_css_shadow_value_start_drawing (const GtkCssValue *shadow,
   cairo_surface_set_device_scale (surface, x_scale, y_scale);
   cairo_surface_set_device_offset (surface,
                                     x_scale * ((blur_x ? clip_radius: 0) - clip_rect.x),
-                                    y_scale * ((blur_y ? clip_radius * y_scale : 0) - clip_rect.y));
+                                    y_scale * ((blur_y ? clip_radius: 0) - clip_rect.y));
 
   blur_cr = cairo_create (surface);
   cairo_set_user_data (blur_cr, &original_cr_key, cairo_reference (cr), (cairo_destroy_func_t) 
cairo_destroy);