[HarfBuzz] variation selector support

[Jonathan Kew]

On 3 Jun 2010, at 03:31, Behdad Esfahbod wrote:

> Done.  Please test.

Almost.... you missed the case where the last char in the buffer is a variation selector. In that case, the main loop has already processed it, and you have to skip the final buffer->add_output_glyph() call.

Patch attached.

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