Mesa (mesa_7_5_branch): Merge commit 'origin/dlist-statechange-shortcircuit ' into mesa_7_5_branch

[Keith Whitwell]

Module: Mesa
Branch: mesa_7_5_branch
Commit: 1668a679c4aadb37f5af0d6126c414fb9fbbf748
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=1668a679c4aadb37f5af0d6126c414fb9fbbf748

Author: Keith Whitwell <keithw at vmware.com>
Date:   Thu Jul  2 13:29:46 2009 +0100

Merge commit 'origin/dlist-statechange-shortcircuit' into mesa_7_5_branch

Conflicts:
	progs/trivial/Makefile

Pull in a minimal version of statechange shortcircuiting in display
list compilation.  This affects only glMaterial and glShadeModel state,
and includes quite a few tests to exercise various tricky cases.

If this goes well, will consider extending to all state in the future.

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