[BUG] `into_glib_ptr` does not need to be `unsafe fn`

[kawadakk]

Bug description

Similarly to Box::into_raw, IntoGlibPtr::into_glib_ptr merely converts self into a raw pointer, which is inert by itself. There don't seem to be any safety invariants (preconditions) the caller needs to uphold.

Backtrace

N/A

[sdroege]

That's true, same for to_glib_none() etc.

Do you want to provide a PR for that?

[sdroege]

Fixed via #1666

to_glib_none() and others are already not unsafe.