audiounit: Assigning AudioUnit to nullptr before passing it to audiounit_create_unit (#259)
audiounit: Assigning AudioUnit to nullptr before passing it to audiounit_create_unit (#259)

* Assigning AudioUnit to nullptr before passing it to audiounit_create_unit

* Assert passed AudioUnit is nullptr in audiounit_create_unit

kinetiknz/cubeb,kinetiknz/cubeb,kinetiknz/cubeb