status/keyboard: Check for monkey-patched property before using it

This avoid another "reference to undefined property" warning.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/1035

diff --git a/js/ui/status/keyboard.js b/js/ui/status/keyboard.js
index 2f0ab94f0592f147a8dac43cb6fc10e11d8604db..b2e16bc4851bf3ff8844bae62a2c0211c92983d2 100644 (file)
--- a/js/ui/status/keyboard.js
+++ b/js/ui/status/keyboard.js
@@ -715,7 +715,8 @@ var InputSourceManager = class {
         if (!window)
             return;
 
-        if (window._inputSources != this._inputSources) {
+        if (!window._inputSources ||
+            window._inputSources !== this._inputSources) {
             window._inputSources = this._inputSources;
             window._currentSource = this._getNewInputSource(window._currentSource);
         }