Store the position of the file part and use that in

Store the position of the file part and use that in

Mon Mar 15 11:40:43 2004  Owen Taylor  <otaylor@redhat.com>

        * gtk/gtkfilechooserentry.c: Store the position of the
        file part and use that in check_completion_callback()
        and match_selected_callback() to figure out where
        to operate on the text, rather than recomputing the
        information.