[issue1501] mq: can't handle empty patch with message

[OHASHI Hideya]

New submission from OHASHI Hideya <ohachige at gmail.com>:

$ hg init x
$ cd x
$ hg qinit
$ hg qnew a
$ hg qref -m a
$ hg qpop
patch queue now empty
$ hg qpush
applying a
/usr/bin/patch: **** Only garbage was found in the patch input.
patch failed, unable to continue (try -v)
patch a is empty
now at: a

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messages: 8557
nosy: ohachige
priority: bug
status: unread
title: mq: can't handle empty patch with message

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Mercurial issue tracker <mercurial-bugs at selenic.com>
<http://www.selenic.com/mercurial/bts/issue1501>
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