RAI Radio getChannels broke the add-on

[andcoz]

During the initialization, the add-on tries to get the list of "radio" channel at http://www.raiplayradio.it/dirette/ContentSet-8e2a3414-bbfd-4a72-852b-7d827dc00e7e.html?json but it gets a 404 response.

2022-05-15 17:15:03.775 T:1300042624   ERROR: EXCEPTION Thrown (PythonToCppException) : -->Python callback/script returned the following error<--
                                             - NOTE: IGNORING THIS CAN LEAD TO MEMORY LEAKS!
                                            Error Type: <class 'urllib2.HTTPError'>
                                            Error Contents: HTTP Error 404: Not Found
                                            Traceback (most recent call last):
                                              File "/storage/.kodi/addons/plugin.video.raitv/default.py", line 49, in <module>
                                                radio_stations = cache.cacheFunction(RaiPlayRadio().getChannels)
                                              File "/storage/.kodi/addons/script.common.plugin.cache/resources/lib/storage_server/StorageServer.py", line 628, in cacheFunction
                                                ret_val = funct(*args)
                                              File "/storage/.kodi/addons/plugin.video.raitv/resources/lib/raiplayradio.py", line 43, in getChannels
                                                response = json.loads(utils.checkStr(urllib2.urlopen(self.channelsUrl).read()))
                                              File "/usr/lib/python2.7/urllib2.py", line 154, in urlopen
                                              File "/usr/lib/python2.7/urllib2.py", line 435, in open
                                              File "/usr/lib/python2.7/urllib2.py", line 548, in http_response
                                              File "/usr/lib/python2.7/urllib2.py", line 467, in error
                                              File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
                                              File "/usr/lib/python2.7/urllib2.py", line 654, in http_error_302
                                              File "/usr/lib/python2.7/urllib2.py", line 435, in open
                                              File "/usr/lib/python2.7/urllib2.py", line 548, in http_response
                                              File "/usr/lib/python2.7/urllib2.py", line 473, in error
                                              File "/usr/lib/python2.7/urllib2.py", line 407, in _call_chain
                                              File "/usr/lib/python2.7/urllib2.py", line 556, in http_error_default
                                            HTTPError: HTTP Error 404: Not Found
                                            -->End of Python script error report<--
2022-05-15 17:15:03.966 T:1455420288   ERROR: GetDirectory - Error getting plugin://plugin.video.raitv/?content_type=video
2022-05-15 17:15:03.969 T:1937115584   ERROR: CGUIMediaWindow::GetDirectory(plugin://plugin.video.raitv/?content_type=video) failed'

As a temporary work around, I regained "video" streaming by commenting out line 49 of default.py.

@@ -46,7 +46,7 @@
 # Cache channels for 1 hour
 cache = StorageServer.StorageServer("plugin.video.raitv", 1) # (Your plugin name, Cache time in hours)
 tv_stations = cache.cacheFunction(RaiPlay(Addon).getChannels)
-radio_stations = cache.cacheFunction(RaiPlayRadio().getChannels)
+#radio_stations = cache.cacheFunction(RaiPlayRadio().getChannels)
 raisport_keys = cache.cacheFunction(RaiPlay(Addon).fillRaiSportKeys)
 
 # utility functions

IMHO, the migration of "radio" streaming to https://www.raiplaysound.it/ changed something in service endpoints but, unluckily, I am unable to check it now.