[gtk/fix-mnemonic-zero] label: Fix mnemonic zero

[Matthias Clasen <matthiasc src gnome org>]

commit adb5b299c9af7b6bed1f12a5b590abab0bc0e27b
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat May 30 21:40:20 2020 -0400

    label: Fix mnemonic zero
    
    We were confusing '\0' and '0' when parsing the label
    for mnemonics.
    
    Fixes: #2805

 gtk/gtklabel.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtklabel.c b/gtk/gtklabel.c
index a66581cb48..60c9d18d94 100644
--- a/gtk/gtklabel.c
+++ b/gtk/gtklabel.c
@@ -2239,7 +2239,7 @@ extract_mnemonic_keyval (const char      *text,
       p = g_utf8_next_char (p);
       c = g_utf8_get_char (p);
 
-      if (c != '_' && c != '0')
+      if (c != '_' && c != '\0')
         {
           const gsize byte_index = p - text - 1; /* Of the _ */