Don't do autoname when update checking is disabled

Much of that stuff has checking set to None because the source repo is
not accessible. Attempting to pull it is just filling logs with
exception messages which are likely to be masking real errors.

fdroidserver/checkupdates.py

@@ -398,7 +398,7 @@ def main():
             writeit = True
 
         # Do the Auto Name thing as well as finding the CV real name
-        if len(app["Repo Type"]) > 0:
+        if len(app["Repo Type"]) > 0 and mode != 'None':
 
             try: