provide a short-cut version for this macro in case

provide a short-cut version for this macro in case

Tue Feb  3 21:24:01 2004  Tim Janik  <timj@gtk.org>

        * gtype.h (_G_TYPE_CVH): provide a short-cut version for
        this macro in case value->g_type==checked_type for gcc, similar
        to instance and class check short-cuts. this speeds up code that
        makes frequent use of G_VALUE_HOLDS_*() (e.g. setters/getters).

        * gtype.c (type_data_last_unref_Wm): don't call class-cache functions
        for the uncached case, this rendered g_type_class_unref_uncached()
        useless. pointed out by Stefan Westerfeld.