Snippets for ruby-gnome 4.3.8 from Fedora s390x

Sourced from https://kojipkgs.fedoraproject.org/packages/rubygem-gio2/4.3.8/1.fc46/data/logs/s390x/build.log.

• rb-gio2-pollable-source.c:45:27: warning: cast between incompatible function types from ‘gboolean (*)(GObject *, void *)’ {aka ‘int (*)(struct _GObject *, void *)’} to ‘gboolean (*)(void *)’ {aka ‘int (*)(void *)’} [-Wcast-function-type]
     45 |                           (GSourceFunc)source_func,
        |                           ^