leto's bug: display a warning when it happens, and backend ignores malformated threads

weboob/backends/aum/backend.py

@@ -94,6 +94,8 @@ class AuMBackend(BaseBackend, ICapMessages, ICapMessagesPost, ICapDating, ICapCh
             contacts = self.browser.get_threads_list()
 
         for contact in contacts:
+            if not contact.get_id():
+                continue
             thread = Thread(contact.get_id())
             yield thread
 
@@ -169,6 +171,8 @@ class AuMBackend(BaseBackend, ICapMessages, ICapMessagesPost, ICapDating, ICapCh
             with self.browser:
                 contacts = self.browser.get_threads_list()
             for contact in contacts:
+                if not contact.get_id():
+                    continue
                 slut = self._get_slut(contact.get_id())
                 if contact.get_lastmsg_date() > slut['lastmsg']:
                     thread = self.get_thread(contact.get_id(), profiles)

weboob/backends/aum/pages/contact_list.py

@@ -49,6 +49,7 @@ class ContactItem:
 
     def __init__(self, tr):
         self.tr = tr
+        self.id = 0
 
     def __get_element(self, id):
         return self.tr.getElementsByTagName('td')[self.fields.index(id)]
@@ -107,6 +108,9 @@ class ContactItem:
             return None
 
     def get_id(self):
+        if self.id:
+            return self.id
+
         tag = self.__get_element('thread_link')
 
         text = tag.getAttribute('onclick')
@@ -115,8 +119,10 @@ class ContactItem:
         m = regexp.match(text)
 
         if m:
-            return int(m.group(1))
+            self.id = int(m.group(1))
+            return self.id
 
+        warning('Unable to parse ID (%s)' % text)
         return 0