These have changed function signature since msvcr120. _set_app_type used
to be called __set_app_type, and the _set_new_* functions used to have
C++ signatures.

Some applications use this for debug logging. Better to return zero than
uninitialized data.

This adds a build-time dependency on openal, and a run-time dependency
on openal-soft's ALC_SOFT_loopback extension.

Required for PDF printing in OrCAD 16.6.

d2d1: Avoid leaking "object" on an error path in d2d_factory_CreateWicBitmapRenderTarget() (Coverity).