Set 'parent' field of new created subwindows so wdiff can implement
'close subwindows' command.
diff --git a/Lib/stdwin/dirwin.py b/Lib/stdwin/dirwin.py
index 5df85e7..0b3b5db 100755
--- a/Lib/stdwin/dirwin.py
+++ b/Lib/stdwin/dirwin.py
@@ -13,7 +13,8 @@
 	if clicks = 2:
 		name = path.cat(w.name, string)
 		try:
-			w = anywin.open(name)
+			w2 = anywin.open(name)
+			w2.parent = w
 		except posix.error, why:
 			stdwin.message('Can\'t open ' + name + ': ' + why[1])