mmgen-xmrwallet: add missing import of MMGenObject

mmgen/tool/help.py

@@ -195,7 +195,7 @@ def usage(cmdname=None,exit_val=1):
 			die(1,f'{cmdname!r}: no such tool command')
 	else:
 		from ..ui import do_pager
-		do_pager('\n'.join(gen_tool_usage()))
+		do_pager('\n'.join(gen_tool_usage()) + '\n')
 
 	import sys
 	sys.exit(exit_val)

mmgen/xmrwallet.py

@@ -23,7 +23,7 @@ xmrwallet.py - MoneroWalletOps class
 import os,re,time,json
 from collections import namedtuple
 from .common import *
-from .objmethods import Hilite,InitErrors
+from .objmethods import MMGenObject,Hilite,InitErrors
 from .obj import CoinTxID
 from .seed import SeedID
 from .protocol import init_proto