[gnome-control-center] keyboard: Fix variable typo

[Robert Ancell <rancell src gnome org>]

commit ec2d3e2862a26dd0d7d84f8a9c3ad1f624be238b
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue Jul 21 11:30:58 2020 +1200

    keyboard: Fix variable typo

 panels/keyboard/cc-keyboard-option.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/panels/keyboard/cc-keyboard-option.c b/panels/keyboard/cc-keyboard-option.c
index f9ed6e923c..5730fdcf6b 100644
--- a/panels/keyboard/cc-keyboard-option.c
+++ b/panels/keyboard/cc-keyboard-option.c
@@ -92,7 +92,7 @@ static const gchar *allowedd_xkb_compose_options[] = {
 
 /* This list must be kept in sync with what mutter is able to
  * handle. */
-static const gchar *allowdd_xkb_grp_options[] = {
+static const gchar *allowed_xkb_grp_options[] = {
   "grp:toggle",
   "grp:lalt_toggle",
   "grp:lwin_toggle",
@@ -249,7 +249,7 @@ cc_keyboard_option_constructed (GObject *object)
   else if (g_str_equal (self->group, XKB_OPTION_GROUP_COMP))
     self->allowed_xkb_options = allowedd_xkb_compose_options;
   else if (g_str_equal (self->group, XKB_OPTION_GROUP_GRP))
-    self->allowed_xkb_options = allowdd_xkb_grp_options;
+    self->allowed_xkb_options = allowed_xkb_grp_options;
   else
     g_assert_not_reached ();