[gtk/matthiasc/for-master] css: Fix tokenization of CDO

[Matthias Clasen <matthiasc src gnome org>]

commit 90676540ec4cf6cd7a03a339f920a0636d2ff1b1
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Oct 31 00:37:39 2020 -0400

    css: Fix tokenization of CDO
    
    A CDO is 4 characters: <!--, not 3 as our tokenizer
    was pretending.

 gtk/css/gtkcsstokenizer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/css/gtkcsstokenizer.c b/gtk/css/gtkcsstokenizer.c
index 607c4d6992..203d7f3a45 100644
--- a/gtk/css/gtkcsstokenizer.c
+++ b/gtk/css/gtkcsstokenizer.c
@@ -1349,7 +1349,7 @@ gtk_css_tokenizer_read_token (GtkCssTokenizer  *tokenizer,
           tokenizer->data[3] == '-')
         {
           gtk_css_token_init (token, GTK_CSS_TOKEN_CDO);
-          gtk_css_tokenizer_consume (tokenizer, 3, 3);
+          gtk_css_tokenizer_consume (tokenizer, 4, 4);
         }
       else
         {