[NaCl SDK] A bunch of spelling fixes.

native_client_sdk/src/examples/hello_world_gles/hello_world.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.
  */
 
 /** @file hello_world_gles.cc
  * This example demonstrates loading and running a simple 3D openGL ES 2.0
  * application.
  */
 
@@ skipping 377 matching lines @@
 
   // If we can't preallocate the buffer because the size is unknown, then
   // fail the load.
   if (total == -1) {
     req->cb_(NULL);
     FreeRequest(req);
     return;
   }
 
   // Otherwise allocate a buffer with enough space for a terminating
-  // NUL in case we need one.
+  // NULL in case we need one.
   cnt = (total > LONG_MAX) ? LONG_MAX : (int32_t) total;
   req->buf_ = (char *) malloc(cnt + 1);
   req->buf_[cnt] = 0;
   req->size_ = cnt;
   int32_t bytes = ppb_urlloader_interface->ReadResponseBody(req->loader_,
       req->buf_, cnt, PP_MakeCompletionCallback(URLPartialRead, req));
 
   // Usually we are pending.
   if (bytes == PP_OK_COMPLETIONPENDING) return;
 
@@ skipping 195 matching lines @@
   }
   return NULL;
 }
 
 
 /**
  * Called before the plugin module is unloaded.
  */
 PP_EXPORT void PPP_ShutdownModule() {
 }