The commit also moves certain functions from the private header
as they are not used anywhere else and removes COGL_EXPORT
when the function is supposed to be private and is not used outside of
cogl
Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3437>
This basically reverts commit 54735dec, which tried to avoid the
GLib-defined types in favor the standard C ones. One exception to this
is the bool type, for which the commit introduces a new type CoglBool.
Let's just get rid of this type in favor of having consistency with the
GLib types. Note by the way that neither CoglBool nor gboolean (which
has a size of `int`) are completely compatible with bool (size `char`).
https://gitlab.gnome.org/GNOME/mutter/merge_requests/321
