From: Jens Leuschner
Subject: Small patch for libSDL

In newer XFree86 releases in the German keyboard the "AltGr"-Key no
longer produces the keysym "Mode_switch", instead it produces
"ISO_Level3_Shift".
I have created a small patch against SDL-1.2.6 (which cleanly applies to
the current CVS-SDL too) that makes SDL recognize ISO_Level3_Shift as
AltGR key.

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extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40806