keyboard: Fix JS warning

The solution is pointed out by the warning itself.

diff --git a/js/ui/keyboard.js b/js/ui/keyboard.js
index 6ecef255c199fb976af0a0f6acd52dd6c1ff6a63..cbfdb091443bdcc743e18f902b7d767371d3ffc7 100644 (file)
--- a/js/ui/keyboard.js
+++ b/js/ui/keyboard.js
@@ -278,7 +278,7 @@ var Key = class Key {
     }
 
     _getKeyval(key) {
-        let unicode = String.charCodeAt(key, 0);
+        let unicode = key.charCodeAt(0);
         return Clutter.unicode_to_keysym(unicode);
     }