[gtk+/gtk-3-8] cssimage: Add forgotten line

[Matthias Clasen <matthiasc src gnome org>]

commit 287464a64aea07ecfad0cfeeb954b90aaad80762
Author: Benjamin Otte <otte redhat com>
Date:   Tue May 28 15:14:55 2013 +0200

    cssimage: Add forgotten line
    
    That line was already missing in the initial commit it seems.

 gtk/gtkcssimagelinear.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtkcssimagelinear.c b/gtk/gtkcssimagelinear.c
index 0bf89e7..0d9f866 100644
--- a/gtk/gtkcssimagelinear.c
+++ b/gtk/gtkcssimagelinear.c
@@ -471,6 +471,7 @@ gtk_css_image_linear_transition (GtkCssImage *start_image,
   start = GTK_CSS_IMAGE_LINEAR (start_image);
 
   if (end_image == NULL)
+    return GTK_CSS_IMAGE_CLASS (_gtk_css_image_linear_parent_class)->transition (start_image, end_image, 
property_id, progress);
 
   if (!GTK_IS_CSS_IMAGE_LINEAR (end_image))
     return GTK_CSS_IMAGE_CLASS (_gtk_css_image_linear_parent_class)->transition (start_image, end_image, 
property_id, progress);