#120 extended character support

[Hans-Christoph Steiner]

Enable support for more characters, like characters with umlauts and accents.

Following this discussion:

http://lists.puredata.info/pipermail/pd-list/2006-12/045571.html

[Hans-Christoph Steiner]

patch against pd/src/g_rtext.c

[Miller Puckette]

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Taken for 0.41. I'll edit the comment to make it appropriately scary.

[Miller Puckette]

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Had to change it to reject \0177 (delete) characters.