Close WinSparkle nicely on exit.

EDMarketConnector.py

@@ -518,6 +518,7 @@ class AppWindow:
         if platform!='darwin' or self.w.winfo_rooty()>0:	# http://core.tcl.tk/tk/tktview/c84f660833546b1b84e7
             config.set('geometry', '+{1}+{2}'.format(*self.w.geometry().split('+')))
         config.close()
+        self.updater.close()
         self.session.close()
         self.w.destroy()
 

update.py

@@ -60,7 +60,7 @@ elif sys.platform=='darwin':
             if self.updater:
                 self.updater.checkForUpdates_(None)
 
-        def close():
+        def close(self):
             self.updater = None
 
 
@@ -113,5 +113,5 @@ elif sys.platform=='win32':
 
         def close(self):
             if self.updater:
-                updater.win_sparkle_cleanup()
+                self.updater.win_sparkle_cleanup()
             self.updater = None