[cairo] [PATCH] fix autoconf warning

[Luca Barbato]

as explained in [1] autoconf 2.68 adds some checks for AC_LINK_IFELSE

lu

[1]http://flameeyes.eu/autotools-mythbuster/forwardporting/autoconf.html

-- 

Luca Barbato
Gentoo/linux
http://dev.gentoo.org/~lu_zero

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