Bug in platform.py and ajax.py

Revision 557 brought a bug when starting the server, see the traceback for more information.

Traceback (most recent call last): File "serve.py", line 198, in <module> run() File "serve.py", line 195, in run Server(parse_commandline()).run() File "serve.py", line 85, in __init__ platform=Platform(self.var_dir) File "~/vispaweb/vispa-web/vispa/platform.py", line 62, in __init__ self.controller = PlatformController(self) File "~/vispaweb/vispa-web/vispa/controller/platform.py", line 26, in __init__ self.ajax=AjaxController(platform) File "~/vispaweb/vispa-web/vispa/controller/ajax.py", line 23, in __init__ self.vfs = VFSController(platform) TypeError: this constructor takes no arguments

(from redmine: issue id 946, created on 2012-04-23 by root, closed on 2012-05-21)