[cairo] Fix crash - SurfacePatternDrawFunc in cairo-quartz-surface.c

[Mox Soini]

Hi all,

I'm trying to port the OpenOffice.org's cairo canvas to Mac OS X
Quartz, and I have a more-or-less working build of it.

Otherwise it seems to be working fine, except when the code was
implemented in OOo to take advantage of native images as source
surface (using CGBitmapContext), the SurfacePatternDrawFunc() crashed.

This was caused by _init_pattern_with_snapshot() failing in
_cairo_quartz_cairo_repeating_surface_pattern_to_quartz()


The attached patch (against the cairo HEAD) fixes this problem and I'm
able to see the native images properly in OpenOffice.org's full screen
presentation mode (i.e. in Impress)

Best Regards,

      Mox Soini

--
Mox on G
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