turned all modifications to the first 32 integer bits in a closure into

turned all modifications to the first 32 integer bits in a closure into

Mon Aug  1 23:00:42 2005  Tim Janik  <timj@imendio.com>

        * gclosure.c: turned all modifications to the first 32 integer bits in a
        closure into atomic accesses. wrapped write accesses into special macros
        to keep the atomic modification logic in a single place. comment cleanups.

        * gclosure.h: made all atomicly accessed closure fields volatile.

        * gobject.h: made ref_count field volatile.