Thu Jan 29 21:36:14 1998  Tim Janik  <timj@gimp.org>

        * gtk/gtksignal.c (gtk_signal_query): new function to gather
          information about a certain signal.

        * gtk/gtksignal.c (gtk_signal_newv): new function similar to
          gtk_signal_new().

        * gtk/gtksignal.c (gtk_signal_real_emit): check for function_offset
          == 0.

        * gtk/gtksignal.c (gtk_signal_connect_by_type): perform a signal
          id lookup on the parent as well.

        * gtk/gtkobject.c (gtk_object_class_add_user_signal): new
          function for implementation of user defined signals.
        * gtk/gtkobject.c (gtk_object_class_add_signals): free old
          signal id array.

        * gtk/gtkobject.h: this holds the typedefs for GtkSignalFunc and
          GtkSignalMarshaller now, because they are used for
          gtk_object_class_add_user_signal.

        * gtk/gtktypeutils.c (gtk_type_class_init): reset object_class->signals
          and object_class->nsignals for new object classes.