A (possibly contentious?) change in the public headers. Those names were never
part of any specification, and I don't know why the struct names differed from
the actual type name. But with C++, which takes the original struct declaration
as the original name, it was affecting the type's internal symbols.
This shouldn't affect user code since ALCdevice_struct and ALCcontext_struct
were never part of the spec. If issues arise from this change, it should be
reported.
399dfca1e3