Fix strict aliasing warnings and viiolations to make GLib and

    Fix strict aliasing warnings and viiolations to make GLib and
        GLib users buildable with gcc 4.4. Patch by Jakub Jelinek.

        * glib/gatomic.[hc]: Add G_GNUC_MAY_ALIAS to pointer arguments,
        fix macro versions to only operate on objects of the same size.

        * glib/gdataset.c:
        * glib/gthread.[hc]:
        * glib/gdatasetprivate.h: Remove unnecessary casts in
        g_atomic_pointer_get calls.

svn path=/trunk/; revision=7875