Refleaks in setint() of mmapmodule.c

[shihai1991]

BPO	38168
Nosy	@zhangyangyu, @miss-islington, @shihai1991
PRs	bpo-38168: Fix possible refleaks in setint() of mmapmodule.c #16136 [3.8] bpo-38168: Fix a possbile refleak in setint() of mmapmodule.c (GH-16136) #16174 [3.7] bpo-38168: Fix a possbile refleak in setint() of mmapmodule.c (GH-16136) #16175 [2.7] bpo-38168: Fix a possbile refleak in setint() of mmapmodule.c (GH-16136) #16176

^{Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.}

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GitHub fields:

assignee = None
closed_at = <Date 2019-09-16.07:09:19.274>
created_at = <Date 2019-09-14.06:17:23.905>
labels = ['extension-modules', '3.8', 'type-bug', '3.7', '3.9']
title = 'Refleaks in setint() of mmapmodule.c'
updated_at = <Date 2019-09-16.07:09:19.256>
user = 'https://github.com/shihai1991'

bugs.python.org fields:

activity = <Date 2019-09-16.07:09:19.256>
actor = 'xiang.zhang'
assignee = 'none'
closed = True
closed_date = <Date 2019-09-16.07:09:19.274>
closer = 'xiang.zhang'
components = ['Extension Modules']
creation = <Date 2019-09-14.06:17:23.905>
creator = 'shihai1991'
dependencies = []
files = []
hgrepos = []
issue_num = 38168
keywords = ['patch']
message_count = 4.0
messages = ['352412', '352511', '352512', '352519']
nosy_count = 3.0
nosy_names = ['xiang.zhang', 'miss-islington', 'shihai1991']
pr_nums = ['16136', '16174', '16175', '16176']
priority = 'normal'
resolution = 'fixed'
stage = 'resolved'
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue38168'
versions = ['Python 2.7', 'Python 3.7', 'Python 3.8', 'Python 3.9']

[shihai1991]

As the title said, in setint function, the refcount of o should decreased all the time.

[miss-islington]

New changeset 322309e by Miss Islington (bot) in branch '3.8':
[3.8] bpo-38168: Fix a possbile refleak in setint() of mmapmodule.c (GH-16136) (GH-16174)
322309e

[miss-islington]

New changeset e857fe6 by Miss Islington (bot) in branch '3.7':
[3.7] bpo-38168: Fix a possbile refleak in setint() of mmapmodule.c (GH-16136) (GH-16175)
e857fe6

[zhangyangyu]

New changeset 68d8c12 by Xiang Zhang in branch '2.7':
[2.7] bpo-38168: Fix a possbile refleak in setint() of mmapmodule.c (GH-16136) (GH-16176)
68d8c12