[Rpm-maint] [rpm-software-management/rpm] Fix a minor memory leak on failed sqlite database open (RhBug:1896301) (#1430)

[Panu Matilainen]

Curiously, sqlite allocates resources that need freeing even in case
of failure to open. Quoting from https://www.sqlite.org/c3ref/open.html:

> Whether or not an error occurs when it is opened, resources associated
> with the database connection handle should be released by passing it to
> sqlite3_close() when it is no longer required.

I disagree, but as it's documented behavior there's no point filing a
bug. So lets close the non-open connection and chug on.
You can view, comment on, or merge this pull request online at:

  https://github.com/rpm-software-management/rpm/pull/1430

-- Commit Summary --

  * Fix a minor memory leak on failed sqlite database open (RhBug:1896301)

-- File Changes --

    M lib/backend/sqlite.c (2)

-- Patch Links --

https://github.com/rpm-software-management/rpm/pull/1430.patch
https://github.com/rpm-software-management/rpm/pull/1430.diff

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