Fixed bug causing character data corruption in direct path load on no…

[koddachad]

…n-UTF-8 databases

Thanks for contributing!

Before submitting PRs for python-oracledb you must have your signed Oracle
Contributor Agreement accepted. See https://oca.opensource.oracle.com

If the problem solved is small, you may find it easier to open an Issue
describing the problem and its cause so we can create the fix.

The bottom of your commit message must have the following line using your name
and e-mail address as it appears in the OCA Signatories list.

Signed-off-by: Chad Ongstad chad@kodda.io

This can be automatically added to pull requests by committing with:

git commit --signoff

[oracle-contributor-agreement]

Thank you for your pull request and welcome to our community! To contribute, please sign the Oracle Contributor Agreement (OCA).
The following contributors of this PR have not signed the OCA:

• PR author: koddachad
• chad@kodda.io (@koddachad)

To sign the OCA, please create an Oracle account and sign the OCA in Oracle's Contributor Agreement Application.

When signing the OCA, please provide your GitHub username. After signing the OCA and getting an OCA approval from Oracle, this PR will be automatically updated.

If you are an Oracle employee, please make sure that you are a member of the main Oracle GitHub organization, and your membership in this organization is public.

[oracle-contributor-agreement]

Thank you for signing the OCA.