The array query APIs now all do:

  - Return the total number of items
  - Take a start_offset, such that individual items can be fetched
  - The _count IN/OUT variable always has number of items written
    into the array upon return of the function

It's not part of the standard and MSVC doesn't like it.  It makes the code
a lot less elegant than it used to be, but I think it should work now.

Part of Bug 595539 - Regressions in rendering certain Thai sequences with
OpenType font

Part of Bug 595539 - Regressions in rendering certain Thai sequences with
OpenType font

Apparetly in C++, inline means a totally different thing.

This reverts commit c939f6aff405ca7b10b1f1538f46148bff719fcb.

GSUB is done!