Allow webrtc compilation with stlport

modules/audio_processing/intelligibility/intelligibility_utils.cc

Index: modules/audio_processing/intelligibility/intelligibility_utils.cc
diff --git a/modules/audio_processing/intelligibility/intelligibility_utils.cc b/modules/audio_processing/intelligibility/intelligibility_utils.cc
index d67d200689f1613391c18c138b55f504a18ffde4..0f9ff78a828b973a9f8690f847e369f34bc0fc84 100644
--- a/modules/audio_processing/intelligibility/intelligibility_utils.cc
+++ b/modules/audio_processing/intelligibility/intelligibility_utils.cc
@@ -36,7 +36,7 @@ bool cplxfinite(complex<float> c) {
 }
 
 bool cplxnormal(complex<float> c) {
-  return std::isnormal(c.real()) && std::isnormal(c.imag());
+  return isnormal(c.real()) && isnormal(c.imag());

[Andrew MacDonald, 2015/07/22 19:41:30]

Actually this is failing for me on Linux ("use of undeclared identifier
'isnormal'"). We could add a wrapper with hacky platform #ifdefs, but I think
better to remove this entirely because it shouldn't really be needed.

Filed a bug here:
https://code.google.com/p/webrtc/issues/detail?id=4866

Could you revert the change to this file? I can at least land the data() fix.

[jdduke (slow), 2015/07/22 19:51:00]

Done.

 }
 
 complex<float> zerofudge(complex<float> c) {
@@ -321,7 +321,7 @@ void GainApplier::Apply(const complex<float>* in_block,
                         complex<float>* out_block) {
   for (int i = 0; i < freqs_; ++i) {
     float factor = sqrtf(fabsf(current_[i]));
-    if (!std::isnormal(factor)) {
+    if (!isnormal(factor)) {
       factor = 1.0f;
     }
     out_block[i] = factor * in_block[i];