Bug 1475

Currently, when you want to retrieve the names of all the audio elements present, you can use several OpenAL constants offered by various extensions:
 * ALC_DEVICE_SPECIFIER
 * ALC_CAPTURE_DEVICE_SPECIFIER
 * ALC_ALL_DEVICES_SPECIFIER

The first two are part of the ALC_ENUMERATION_EXT extension, and the last is part of the ALC_ENUMERATE_ALL_EXT extension.

However, all 3 can be obtained via the alcGetString(null, param) method, which instead of returning a null terminated string, returns a doubly null terminated string, allowing you to store an array of strings in it.

Management of doubly null terminated strings is already handled, but was only activated for ALC_DEVICE_SPECIFIER.

Here, management has been extended to all three parameters.

And JOALVersion now shows all devices present with the 3 parameters (since the ALC_ENUMERATE_ALL_EXT extension is not necessarily present, but shows more comprehensible results for the user instead of just the 'OpenAL Soft' driver).