Cairo: add missing braces around array-of-struct definition
Cairo: add missing braces around array-of-struct definition

This triggered a -Wmissing-braces warning.

https://bugzilla.gnome.org/show_bug.cgi?id=668497

jdahlin/pygobject,thiblahute/pygobject,choeger/pygobject-cmake,MathieuDuponchelle/pygobject,choeger/pygobject-cmake,davidmalcolm/pygobject,MathieuDuponchelle/pygobject,sfeltman/pygobject,GNOME/pygobject,davibe/pygobject,davidmalcolm/pygobject,GNOME/pygobject,MathieuDuponchelle/pygobject,thiblahute/pygobject,sfeltman/pygobject,jdahlin/pygobject,davibe/pygobject,davibe/pygobject,davibe/pygobject,pexip/pygobject,pexip/pygobject,GNOME/pygobject,jdahlin/pygobject,sfeltman/pygobject,pexip/pygobject,choeger/pygobject-cmake,davidmalcolm/pygobject,thiblahute/pygobject