Fix a bug in which revtool could go in an infinite loop if the user didn't have a lease.
Fix a bug in which revtool could go in an infinite loop
if the user didn't have a lease.

bk: 4489dac7Y6wXJuZRjjNxJTu-MFvcJQ
bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper