added active gamepad related checks

js/gamepad.js

@@ -158,6 +158,8 @@ class Gamepad {
 
         // ensure that a gamepad is currently active
         if (!this.activeGamepad) {
+            this.displayGamepadHelp();
+
             return;
         }
 
@@ -175,6 +177,10 @@ class Gamepad {
             }
         }
 
+        if (!this.activeGamepadType) {
+            return;
+        }
+
         let button;
         let axis;
         this.hideGamepadHelp();