[issue36901] Fix leaks in /PC/bdist_wininst/install.c

[Cheryl Sabella]

New submission from Cheryl Sabella <cheryl.sabella at gmail.com>:

/PC/bdist_wininst/install.c contains some memory leaks.

PR2142 appears to be abandoned, so a new PR needs to be opened with the changes and also with the additional changes requested by Serhiy.

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components: Installation
messages: 342311
nosy: cheryl.sabella, serhiy.storchaka, vstinner
priority: normal
severity: normal
stage: needs patch
status: open
title: Fix leaks in /PC/bdist_wininst/install.c
type: enhancement
versions: Python 3.8

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue36901>
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