test/file-register: cleanups

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/test/file-register.c b/test/file-register.c
index effa021..0f4d679 100644
--- a/test/file-register.c
+++ b/test/file-register.c
@@ -562,16 +562,15 @@
 		goto err;
 	}
 
-    /* -2 to skip */
-    files[90] = -2;
+	files[90] = IORING_REGISTER_FILES_SKIP;
 	ret = io_uring_register_files_update(ring, 90, &files[90], 1);
 	if (ret != 1) {
 		fprintf(stderr, "%s: update ret=%d\n", __FUNCTION__, ret);
 		goto err;
 	}
 
-    /* verify can still use file index 90 */
-    if (test_fixed_read_write(ring, 90))
+	/* verify can still use file index 90 */
+	if (test_fixed_read_write(ring, 90))
 		goto err;
 
 	ret = io_uring_unregister_files(ring);
@@ -587,7 +586,6 @@
 	return 1;
 }
 
-
 static int test_sparse_updates(void)
 {
 	struct io_uring ring;
@@ -816,7 +814,7 @@
 		return ret;
 	}
 
-    ret = test_skip(&ring);
+	ret = test_skip(&ring);
 	if (ret) {
 		printf("test_skip failed\n");
 		return 1;
@@ -836,4 +834,3 @@
 
 	return 0;
 }
-