prevent traceback when changing nick

src/common/connection.py

@@ -1746,18 +1746,19 @@ class Connection(ConnectionHandlers):
 		self.add_lang(p)
 		if not change_nick:
 			t = p.setTag(common.xmpp.NS_MUC + ' x')
-		last_date = gajim.logger.get_last_date_that_has_logs(room_jid, self.name,
-			is_room=True)
-		if last_date is None:
-			last_date = time.time() - gajim.config.get('muc_restore_timeout') * 60
-		else:
-			last_time = min(last_date, time.time() - gajim.config.get(
-				'muc_restore_timeout') * 60)
-		last_date = time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime(last_date))
-		t.setTag('history', {'maxstanzas': gajim.config.get('muc_restore_lines'),
-			'since': last_date})
-		if password:
-			t.setTagData('password', password)
+			last_date = gajim.logger.get_last_date_that_has_logs(room_jid,
+				self.name, is_room=True)
+			if last_date is None:
+				last_date = time.time() - gajim.config.get(
+					'muc_restore_timeout') * 60
+			else:
+				last_time = min(last_date, time.time() - gajim.config.get(
+					'muc_restore_timeout') * 60)
+			last_date = time.strftime('%Y-%m-%dT%H:%M:%SZ', time.gmtime(last_date))
+			t.setTag('history', {'maxstanzas': gajim.config.get(
+				'muc_restore_lines'), 'since': last_date})
+			if password:
+				t.setTagData('password', password)
 		self.connection.send(p)
 
 		# last date/time in history to avoid duplicate