Error in the save function of CookieValuePersister
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Key: WICKET-3999
URL: https://issues.apache.org/jira/browse/WICKET-3999
Project: Wicket
Issue Type: Bug
Components: wicket
Affects Versions: 1.4.18
Reporter: Gabriel LANDON
Priority: Minor
The test in the SetValue is incorrect and can lead to save a "null" string
instead of an empty string in the cookie.
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