Wed May  6 02:16:34 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtksignal.c: reimplemented the signal storage system to use a
        linear array rather than a hash table.
        be carefull *not* to keep any GtkSignal pointers across invokations
        of gtk_signal_next_and_invalidate() and therefore gtk_signal_new[v]().
        general code cleanups, made all allocations through memchunks.
        (gtk_signal_lookup): we now do the lookup of signals through a key_id
        for the signal names to avoid multiple hashing of the signal name on
        lookups for the several hirarchy levels of an object.

Tue May  5 15:33:27 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtkmain.c (gtk_init): added gtk_signal_init() to avoid repeatedly
        checking for signal initialization in gtksignal.c.

        * gtk/gtktypeutils.c (TYPE_NODES_BLOCK_SIZE): reseted this to 200 after
        a long debugging period ;)

Mon May  4 00:30:11 1998  Tim Janik  <timj@gtk.org>

        * gtk/gtktypeutils.h (GTK_TYPE_IS_A): new macro to speedup
        gtk_type_is_a().
        * gtk/gtktypeutils.c: reimplemented the type storage system to use a
        linear array rather than a hash table. it actually speeded up testgtk
        for a *considerable* amount. be carefull *not* to keep any GtkTypeNode
        pointers across invokations of gtk_type_node_next_and_invalidate() and
        therefore gtk_type_unique()!

        * gtk/gtkobject.h (GTK_IS_OBJECT_CLASS): new macro to test for the
        inheritance of a class pointer.
        (GTK_OBJECT): modifications for speedups.
        (GTK_IS_OBJECT): likewise.
        (GTK_OBJECT_CLASS): likewise.
        (suggested by owen).

        * gtk/gtkcontainer.h (GTK_IS_CONTAINER_CLASS): new macro.

        * gtk/gtkwidget.h (GTK_IS_WIDGET_CLASS): new macro.

        * gtk/gtk.defs (GtkTooltips): define GtkTooltips as object not as boxed,
        since its derivation changed 4 month ago ;(. showed up with the unique
        type name checking code in gtk_type_unique().

        * random guint->GtkType and macro fixups.