[Open Office] opens___.ttf vs. OpenSymbol

[Martin Kretzschmar]

Hi,

This bug

  https://launchpad.net/distros/ubuntu/+source/openoffice.org/+bug/33786

seems to happen because of a missing glyph (0x2212, between summation and
minus/plus sign). This is missing in our opens___.ttf, but not in
OpenSymbol.sfd.

How can I get the minus back into opens___.ttf or how do I generate the ttf from
the sfd?

Regards,

Martin