[5.1] Use created_by 0 if created_by is empty

[chmst]

Pull Request for Issue #43674 .

Summary of Changes

Make sure that created_by = 0

Testing Instructions

see #43674, change the Author of an article to "no user"

Actual result BEFORE applying this Pull Request

Save failed with the following error: Incorrect integer value: '' for column joomla_51.xw6tv_content.created_by at row 1

Expected result AFTER applying this Pull Request

Article is saved and created_by is set to 0.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[brianteeman]

I have tested this item ✅ successfully on 238b1b8

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43752.}

[SimVT]

I tested this successfully on both a new and existing 5.1.1 installation.

[richard67]

@SimVT If you have tested this PR, please mark your result in the issue tracker here https://issues.joomla.org/tracker/joomla-cms/43752 by using the blue "Test this" button at the top left corner, then selecting the test result and finally submit. This is needed so that the test result is properly counted. It needs 2 successful tests for each PR to get accepted. You can help with that by marking your test result. Thanks in advance.

[SimVT]

I have tested this item ✅ successfully on 238b1b8

I tested this successfully on both a new and existing 5.1.1 installation.

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43752.}

[SimVT]

Thank you Richard67 and my apologies for not knowing the process.

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43752.}

[richard67]

RTC

---

_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/43752.}