One more f->file_name typo

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
diff --git a/filesetup.c b/filesetup.c
index a5b84c2..919bdf4 100644
--- a/filesetup.c
+++ b/filesetup.c
@@ -396,9 +396,10 @@
 	unsigned int i;
 
 	for_each_file(td, f, i) {
-		if (!td->filename && (f->flags & FIO_FILE_UNLINK) &&
+		if (!f->file_name && (f->flags & FIO_FILE_UNLINK) &&
 		    f->filetype == FIO_TYPE_FILE) {
 			unlink(f->file_name);
+			free(f->file_name);
 			f->file_name = NULL;
 		}