[gtk+] reftests: fix style class syntax in CSS file

[Cosimo Cecchi <cosimoc src gnome org>]

commit 131abe28a442220fb542d1a0a12c69833e40fcfc
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Wed Jun 10 20:21:57 2015 -0700

    reftests: fix style class syntax in CSS file
    
    Fixes reftests.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=750605

 .../label-text-shadow-changes-modify-clip.css      |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/testsuite/reftests/label-text-shadow-changes-modify-clip.css 
b/testsuite/reftests/label-text-shadow-changes-modify-clip.css
index 87bd265..bea2d0c 100644
--- a/testsuite/reftests/label-text-shadow-changes-modify-clip.css
+++ b/testsuite/reftests/label-text-shadow-changes-modify-clip.css
@@ -13,7 +13,7 @@ GtkLabel {
   animation-delay: 1ms;
 }
 
-#reference {
+.reference {
   animation: initial;
   text-shadow: 20px 20px tomato;
 }