Hygine: unreachable logging statement

the condition $title === null would only be met when
$workflow->getArticleTitle() returns null, but not
in the case that a workflow couldn't be located.

Correct the code to match the comments and write to debug
log when the wrong title is detected.

Change-Id: I8da1df751de732e2d8c5f5a55d55ee74c44cd009
Merge "Hygine: unreachable logging statement"