Now uses screen address for all buffers.

Now uses screen address for all buffers.

SCCS-vsn: usr.bin/window/wwinit.c 3.10
SCCS-vsn: usr.bin/window/wwmisc.c 3.3
SCCS-vsn: usr.bin/window/wwopen.c 3.12
SCCS-vsn: usr.bin/window/ww.h 3.14
SCCS-vsn: usr.bin/window/cmd.c 3.12
SCCS-vsn: usr.bin/window/wwwrite.c 3.11
SCCS-vsn: usr.bin/window/wwclose.c 3.5
SCCS-vsn: usr.bin/window/wwframe.c 3.10
SCCS-vsn: usr.bin/window/wwlabel.c 3.7
SCCS-vsn: usr.bin/window/cmd5.c 3.6
SCCS-vsn: usr.bin/window/:ww 1.4
SCCS-vsn: usr.bin/window/wwadd.c 3.5
SCCS-vsn: usr.bin/window/wwdelete.c 3.5
SCCS-vsn: usr.bin/window/wwalloc.c 3.5
SCCS-vsn: usr.bin/window/wwinsline.c 3.5
SCCS-vsn: usr.bin/window/wwdelline.c 3.5
SCCS-vsn: usr.bin/window/wwclreol.c 3.9
SCCS-vsn: usr.bin/window/wwdata.c 3.5
SCCS-vsn: usr.bin/window/wwdump.c 3.5
SCCS-vsn: usr.bin/window/wwinschar.c 3.8
SCCS-vsn: usr.bin/window/wwunframe.c 3.8
SCCS-vsn: usr.bin/window/wwclreos.c 3.3
SCCS-vsn: usr.bin/window/wwdelchar.c 3.6
SCCS-vsn: usr.bin/window/wwscroll.c 3.10
SCCS-vsn: usr.bin/window/wwredrawwin.c 3.5
SCCS-vsn: usr.bin/window/wwcursor.c 3.3
SCCS-vsn: usr.bin/window/wwmove.c 3.2