#1481 [core] CPD: no problems found results in blank file instead of empty xml

[robert]

In case that CPD does not find any problems, a blank file (filesize 0) is created instead of an empty xml file with the following content:

<?xml version="1.0" encoding="UTF-8"?>
<pmd-cpd>
</pmd-cpd>

[Andreas Dangel]

This will be fixed with PMD 5.3.8, 5.4.2 and 5.5.0 and later.

Commit: https://github.com/pmd/pmd/commit/13f7675b67401ade55f7be87741c8173632e5c04