Fix about box close (thanks to Parag AN)
http://code.google.com/p/dissy/issues/detail?id=2

Lubomir Rintel <lkundrak@v3.sk>

--- dissy-8/scripts/dissy.about	2009-02-06 11:35:00.000000000 +0100
+++ dissy-8/scripts/dissy	2009-02-06 11:35:51.000000000 +0100
@@ -189,7 +189,8 @@
 	about.set_version("v%s" % (PROGRAM_VERSION) )
 	about.set_copyright("(C) Simon Kagstrom, 2006-2009")
 	about.set_website(PROGRAM_URL)
-	about.show()
+	about.run()
+	about.hide()
 
     def redisplayFunction(self):
 	try: