Prevent double root dir checking when using lazy root directory creat…

…ion for the local filesystem.

src/Local/LocalFilesystemAdapter.php

@@ -95,6 +95,7 @@ private function ensureRootDirectoryExists(): void
         }
 
         $this->ensureDirectoryExists($this->rootLocation, $this->visibility->defaultForDirectories());
+        $this->rootLocationIsSetup = true;
     }
 
     public function write(string $path, string $contents, Config $config): void