[mutter] input-settings: Specify middle-click-emulation key

[Jonas Ådahl <jadahl src gnome org>]

commit 074f4974ddc6bf8d05914bded058fd131a3fdc8a
Author: Daniel van Vugt <daniel van vugt canonical com>
Date:   Mon Mar 16 15:09:00 2020 +0800

    input-settings: Specify middle-click-emulation key
    
    Which exists, unlike `emulate-middle`.
    
    Closes: https://gitlab.gnome.org/GNOME/mutter/issues/1124

 src/backends/meta-input-settings.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/backends/meta-input-settings.c b/src/backends/meta-input-settings.c
index 67dfd82b2..3bee36d41 100644
--- a/src/backends/meta-input-settings.c
+++ b/src/backends/meta-input-settings.c
@@ -424,7 +424,7 @@ update_middle_click_emulation (MetaInputSettings  *input_settings,
                                ClutterInputDevice *device)
 {
   ConfigBoolFunc func;
-  const gchar *key = "emulate-middle";
+  const gchar *key = "middle-click-emulation";
   MetaInputSettingsPrivate *priv = meta_input_settings_get_instance_private (input_settings);
 
   if (!settings)