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# backported fix for newer compilers
--- src/async/audio/AsyncAudioDeviceAlsa.cpp.orig	2017-12-27 16:32:27.185098621 +0000
+++ src/async/audio/AsyncAudioDeviceAlsa.cpp	2017-12-27 16:33:33.468067578 +0000
@@ -548,7 +548,7 @@
     return false;
   }
 
-  if (::abs(real_rate - sample_rate) > 100)
+  if (::abs(static_cast<int>(real_rate) - sample_rate) > 100)
   {
     cerr << "*** ERROR: The sample rate could not be set to "
          << sample_rate << "Hz for ALSA device \"" << dev_name << "\". "