Make Xutf8DrawString works correctly with ISO10646 fonts.

Signed-off-by: Liang Chang <l-chang@users.sourceforge.net>
4 jobs for utf8 in 9 minutes and 24 seconds (queued for 2 seconds)
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00:00:38

passed container-prep #13462646

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  Build
passed build #13462647

00:07:56

 
  Deploy
passed check-merge-request #13462648

00:00:49