fixup! New log format to show node id (and optionally cluster name) in node column

Commit aa4d621d broke log rotation
and neolog sometimes failed to read in new format.

neo/lib/logger.py

@@ -102,7 +102,7 @@ class NEOLogger(Logger):
         if self._db is None:
             return
         q = self._db.execute
-        if not q("SELECT id FROM packet LIMIT 1").fetchone():
+        if not q("SELECT 1 FROM packet LIMIT 1").fetchone():
             q("DROP TABLE protocol")
             # DROP TABLE already replaced previous data with zeros,
             # so VACUUM is not really useful. But here, it should be free.

neo/scripts/neolog.py

@@ -77,7 +77,7 @@ class Log(object):
                 date = " WHERE date>?"
             old = "SELECT date, name, NULL, NULL, %s FROM %s" + date
             new = ("SELECT date, name, cluster, nid, %s"
-                   " FROM %s JOIN node ON node=id" + date)
+                   " FROM %s LEFT JOIN node ON node=id" + date)
             log = 'level, pathname, lineno, msg'
             pkt = 'msg_id, code, peer, body'
             try: