#63 Only empty path to working directory makes expectation of relativ…

…e paths.

This change make sense for zero path ("0")

src/Model/BaselineContent.php

@@ -81,7 +81,7 @@ public function getWorkdir(): ?string
 
     public function setWorkdir(?string $workdir): void
     {
-        $this->relative = (bool) $workdir;
+        $this->relative = '' !== (string) $workdir;
         $this->workdir = $workdir;
     }