[gnome-shell/wip/carlosg/osk-emoji-and-keypad: 18/22] keyboard: Fix JS warning

[Carlos Garnacho <carlosg src gnome org>]

commit ad885ed9ff21c9bd8705db9d0d7ca0ec4acc96cc
Author: Carlos Garnacho <carlosg gnome org>
Date:   Mon Jan 21 21:41:46 2019 +0100

    keyboard: Fix JS warning
    
    Iterate correctly through the array, instead of stepping on the possibly
    non existent first element.

 js/ui/keyboard.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/js/ui/keyboard.js b/js/ui/keyboard.js
index 354544bd6..732a11928 100644
--- a/js/ui/keyboard.js
+++ b/js/ui/keyboard.js
@@ -876,7 +876,7 @@ var Keyboard = new Lang.Class({
     },
 
     _setCurrentLevelLatched(layout, latched) {
-        for (let i = 0; layout.shiftKeys[i]; i++) {
+        for (let i = 0; i < layout.shiftKeys.length; i++) {
             let key = layout.shiftKeys[i];
             key.setLatched(latched);
         }