generic/401: Test mountpoint not subdir for filetype support

[Eric Sandeen <sandeen@redhat.com>]

With pending changes for xfs_info/xfs_growfs, the tool
now requires an actual mount point to work properly.

Change this test to test $SCRATCH_MNT not the subdir
beneath it.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
---


diff --git a/tests/generic/401 b/tests/generic/401
index 04bd1a5..74f2bea 100755
--- a/tests/generic/401
+++ b/tests/generic/401
@@ -79,7 +79,7 @@ mknod $testdir/p p
 src/t_dir_type $testdir d | grep -F '.' | sort
 
 # Test that either all file types are unknown or all are correct
-if _supports_filetype $testdir; then
+if _supports_filetype $SCRATCH_MNT; then
 	# print real file types
 	src/t_dir_type $testdir | grep -vF '.' | sort
 else