NFS: Fix a typo in _nfs_display_fhandle

The check for 'fh == NULL' needs to come _before_ we dereference
fh.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>

fs/nfs/inode.c

@@ -1058,7 +1058,7 @@ void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
 {
 	unsigned short i;
 
-	if (fh->size == 0 || fh == NULL) {
+	if (fh == NULL || fh->size == 0) {
 		printk(KERN_DEFAULT "%s at %p is empty\n", caption, fh);
 		return;
 	}