status/keyboard: Check if this._currentSource is valid on activation

this._currentSource might be invalid so check for that to prevent an
exception and still switch to the newly activated source.

https://bugzilla.gnome.org/show_bug.cgi?id=695841

diff --git a/js/ui/status/keyboard.js b/js/ui/status/keyboard.js
index 4e629b107ee22444e4907918861fab32e88f63c2..3dc173b99a4354ffa19e69727a680e05975ec34c 100644 (file)
--- a/js/ui/status/keyboard.js
+++ b/js/ui/status/keyboard.js
@@ -487,7 +487,7 @@ const InputSourceIndicator = new Lang.Class({
             let is = new InputSource(type, id, displayName, shortName, i);
 
             is.connect('activate', Lang.bind(this, function() {
-                if (this._currentSource.index == is.index)
+                if (this._currentSource && this._currentSource.index == is.index)
                     return;
                 this._settings.set_value(KEY_CURRENT_INPUT_SOURCE,
                                          GLib.Variant.new_uint32(is.index));