[Devel] Bug in tt_face_load_hdmx

[Owen Taylor]

If tt_load_hdmx encounters a hdmx table with a version
other than 0 (a version of ArialMT with a version 256
hdmx table was found... not documented in the OpenType
spec so possibly a font bug), then it avoids loading
the table out but leaves hdmx->num_records set, which 
will cause a crash when in tt_face_free_hdmx when it tries 
to loop over the records to free them.

The attached patch fixes in a straightforward way.

OK to commit?

Thanks,
                                        Owen

freetype.diff
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