Fix tail with limit/offset on the web interface. Refs #132

This was broken by a bad merge in 98c56768b83618d6c398a6927aaa3d976b217247

supervisor/web.py

@@ -210,7 +210,6 @@ class TailView(MeldView):
                 rpcinterface = SupervisorNamespaceRPCInterface(supervisord)
                 try:
                     tail = rpcinterface.readProcessLog(processname, limit, offset)
-                    tail = rpcinterface.readProcessLog(processname, -1024, 0)
                 except RPCError as e:
                     if e.code == Faults.NO_FILE:
                         tail = 'No file for %s' % processname