gfio: fix leak of ge->job_files

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/gfio.c b/gfio.c
index eab02c2..d491aba 100644
--- a/gfio.c
+++ b/gfio.c
@@ -1730,6 +1730,8 @@
 		i++;
 	}
 
+	free(ge->job_files);
+	ge->job_files = NULL;
 	ge->nr_job_files = 0;
 	return ret;
 }