[gnome-shell] locatePointer: Use constant for GSettings key

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 5f3bad9c94eadb624cf138ee2e0a954f6876e60c
Author: Florian Müllner <fmuellner gnome org>
Date:   Sat Jun 29 15:22:44 2019 +0200

    locatePointer: Use constant for GSettings key
    
    The constant is defined, so use it.
    
    Spotted by eslint.
    
    https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/606

 js/ui/locatePointer.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/locatePointer.js b/js/ui/locatePointer.js
index 317783a4e..bdbd200ba 100644
--- a/js/ui/locatePointer.js
+++ b/js/ui/locatePointer.js
@@ -15,7 +15,7 @@ var LocatePointer = class {
     }
 
     show() {
-        if (!this._settings.get_boolean("locate-pointer"))
+        if (!this._settings.get_boolean(LOCATE_POINTER_KEY))
             return;
 
         let [x, y, mods] = global.get_pointer();