This commit was manufactured by cvs2svn to create branch 'netbsd-6-0'.
Pull up following revision(s) (requested by abs in ticket #673):
	external/mit/xorg-server/dist/exa/exa_unaccel.c: revision 1.2
	external/mit/xorg-server/dist/exa/exa_priv.h: revision 1.2
Apply patch https://bugs.freedesktop.org/attachment.cgi?id=68718
(with whitespace tweaks) from
https://bugs.freedesktop.org/show_bug.cgi?id=47266
to address graphics corruption using recent Cairo, manifested most
commonly by certain rendered text sections appearing as solid rectangular
blocks of colour.
Should be pulled up to netbsd-6 (and probably -5)