new enum GtkCornerType added window_placement. new method to set

new enum GtkCornerType added window_placement. new method to set

Mon Nov  9 00:39:20 1998  Lars Hamann  <lars@gtk.org>

        * gtk/gtkenums.h : new enum GtkCornerType
        * gtk/gtkscrolledwindow.h (struct _GtkScrolledWindow): added
        window_placement.
        * gtk/gtkscrolledwindow.c (gtk_scrolled_window_set_placement):
        new method to set window_placement.
        (gtk_scrolled_window_viewport_allocate)
        (gtk_scrolled_window_size_allocate): few changes due to
        window_placement.
        * gtk/testgtk.c (remove_selection): fixed while loop.