Allow webrtc compilation with stlport

modules/audio_processing/intelligibility/intelligibility_enhancer.cc

 /*
  *  Copyright (c) 2014 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 373 matching lines @@
           (-beta0 - sqrtf(beta0 * beta0 - 4 * alpha0 * gamma0)) / (2 * alpha0);
     } else {
       sols[n] = -gamma0 / beta0;
     }
     sols[n] = fmax(0, sols[n]);
   }
 }
 
 void IntelligibilityEnhancer::FilterVariance(const float* var, float* result) {
   for (int i = 0; i < bank_size_; ++i) {
-    result[i] = DotProduct(filter_bank_[i].data(), var, freqs_);
+    result[i] = DotProduct(&(*filter_bank_[i].begin()), var, freqs_);

[jdduke (slow), 2015/07/21 21:23:13]

If freqs_ can ever be zero then I'll need to change this.

[Andrew MacDonald, 2015/07/21 22:20:12]

I think
&filter_bank_[i][0] or &filter_bank[i].front()
is a bit clearer.

I think we can safely expect freqs_ to be greater than zero. DCHECK that at the
start of this function?

[jdduke (slow), 2015/07/22 18:07:16]

Done.

   }
 }
 
 float IntelligibilityEnhancer::DotProduct(const float* a,
                                           const float* b,
                                           int length) {
   float ret = 0.0f;
 
   for (int i = 0; i < length; ++i) {
     ret = fmaf(a[i], b[i], ret);
   }
   return ret;
 }
 
 }  // namespace webrtc