[cairo] Minor patches for Windows and Ruby 1.9 compatibility in rcairo

[Kouhei Sutou]

Hi,

In <1316161965-1344-1-git-send-email-now at bitwi.se>
  "[cairo] Minor patches for Windows and Ruby 1.9 compatibility in rcairo" on Fri, 16 Sep 2011 10:32:38 +0200,
  Nikolai Weibull <now at bitwi.se> wrote:

> This series of patches fix some minor problems on Windows and some warnings
> reported by Ruby 1.9 in rcairo.

Thanks!
I've merged your patches with some modifications.


--
kou