Release lock if GetCurrentPosition from DS failed

Multiple minor compile fixes with modern C++

fix compile errors with -D__MACOSX_CORE__

duplex test: 64 bit compatibility

Merge of ALSA underrun warning fix.

Merge of OS-X closeStream() fix to remove property listener.

Trying to merge OS-X closeStream() update.

This change was necessary to prevent BAD ACCESS when compiling on 64 bit OSX

Fixes for WASAPI / ASIO

Static analysis fixes

Fix for NULL options in PULSE audio backend in probeDeviceOpen

Fix calloc-free mismatch

Add algorithm header include

The check if ( subdevice != -1 ) was being done on a potentially
uninitialized variable.

Use free() for allocated memory by calloc (not delete).
Deleting calloc-ed memory will become problem in the environment which
overrides global "operator delete" like some game engine.

Without algorithm header, Visual Studio complaints that std::max is not
declared and defined.
Including algorithm header resolves this issue.

Checking for pulseaudio on Debian

Fix choppy audio on input only mode (WASAPI)

Fix WASAPI shutdown crash