Fix bug in DTMF generation where events with level > 36 would be ignored.

webrtc/modules/audio_coding/neteq/dtmf_buffer_unittest.cc

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 264 matching lines @@
   // Invalid event number.
   event.event_no = -1;
   EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
   event.event_no = 16;
   EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
   event.event_no = 0;  // Valid value;
 
   // Invalid volume.
   event.volume = -1;
   EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
-  event.volume = 37;
+  event.volume = 64;
   EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
   event.volume = 0;  // Valid value;
 
   // Invalid duration.
   event.duration = -1;
   EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
   event.duration = 0;
   EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
   event.duration = 0xFFFF + 1;
   EXPECT_EQ(DtmfBuffer::kInvalidEventParameters, buffer.InsertEvent(event));
   event.duration = 1;  // Valid value;
 
   // Finish with a valid event, just to verify that all is ok.
   EXPECT_EQ(DtmfBuffer::kOK, buffer.InsertEvent(event));
 }
 }  // namespace webrtc