Fix Windows crash_generation_server for debug builds without -D_DEBUG

src/client/windows/crash_generation/crash_generation_server.cc

 // Copyright (c) 2008, Google Inc.
 // All rights reserved.
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 // notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
@@ skipping 67 matching lines @@
 
 static bool IsClientRequestValid(const ProtocolMessage& msg) {
   return msg.tag == MESSAGE_TAG_UPLOAD_REQUEST ||
          (msg.tag == MESSAGE_TAG_REGISTRATION_REQUEST &&
           msg.id != 0 &&
           msg.thread_id != NULL &&
           msg.exception_pointers != NULL &&
           msg.assert_info != NULL);
 }
 
-#ifdef _DEBUG
+#ifndef NDEBUG
 static bool CheckForIOIncomplete(bool success) {
   // We should never get an I/O incomplete since we should not execute this
   // unless the operation has finished and the overlapped event is signaled. If
   // we do get INCOMPLETE, we have a bug in our code.
   return success ? false : (GetLastError() == ERROR_IO_INCOMPLETE);
 }
 #endif
 
 CrashGenerationServer::CrashGenerationServer(
     const std::wstring& pipe_name,
@@ skipping 823 matching lines @@
                                    client.assert_info(),
                                    client.dump_type(),
                                    true);
   if (!dump_generator.GenerateDumpFile(dump_path)) {
     return false;
   }
   return dump_generator.WriteMinidump();
 }
 
 }  // namespace google_breakpad