Pass correct length value in WebGamepads

ppapi/examples/gamepad/gamepad.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <algorithm>
 #include <cmath>
 #include <stdarg.h>
 #include <stdio.h>
 
 #include "ppapi/c/ppb_gamepad.h"
@@ skipping 61 matching lines @@
     Paint();
   }
 
  private:
   void Paint() {
     pp::ImageData image = PaintImage(device_context_.size());
     if (!image.is_null()) {
       device_context_.ReplaceContents(&image);
       device_context_.Flush(
           callback_factory_.NewCallback(&MyInstance::OnFlush));
-    } else {
-      printf("NullImage\n");
     }
   }
 
   pp::ImageData PaintImage(const pp::Size& size) {
     pp::ImageData image(this, PP_IMAGEDATAFORMAT_BGRA_PREMUL, size, true);
     if (image.is_null())
       return image;
 
     PP_GamepadsSampleData gamepad_data;
     gamepad_->Sample(pp_instance(), &gamepad_data);
 
-    if (gamepad_data.length > 1 && gamepad_data.items[0].connected) {
+    if (gamepad_data.length > 0 && gamepad_data.items[0].connected) {
       int width2 = size.width() / 2;
       int height2 = size.height() / 2;
       // Draw 2 axes
       for (size_t i = 0; i < gamepad_data.items[0].axes_length; i += 2) {
         int x = static_cast<int>(
             gamepad_data.items[0].axes[i + 0] * width2 + width2);
         int y = static_cast<int>(
             gamepad_data.items[0].axes[i + 1] * height2 + height2);
         uint32_t box_bgra = 0x80000000;  // Alpha 50%.
         FillRect(&image, x - 3, y - 3, 7, 7, box_bgra);
@@ skipping 35 matching lines @@
 
 namespace pp {
 
 // Factory function for your specialization of the Module object.
 Module* CreateModule() {
   return new MyModule();
 }
 
 }  // namespace pp