[HarfBuzz] variation selector support

[Behdad Esfahbod]

Good point.  Pushed.

On 06/03/2010 04:56 AM, Jonathan Kew wrote:
> On 3 Jun 2010, at 03:31, Behdad Esfahbod wrote:
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>> 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.
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> Patch attached.
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