dlm: Improve a size determination in table_seq_start()

Replace the specification of a data structure by a pointer dereference
as the parameter for the operator "sizeof" to make the corresponding size
determination a bit safer according to the Linux coding style convention.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: David Teigland <teigland@redhat.com>

fs/dlm/debug_fs.c

@@ -435,7 +435,7 @@ static void *table_seq_start(struct seq_file *seq, loff_t *pos)
 	if (bucket >= ls->ls_rsbtbl_size)
 		return NULL;
 
-	ri = kzalloc(sizeof(struct rsbtbl_iter), GFP_NOFS);
+	ri = kzalloc(sizeof(*ri), GFP_NOFS);
 	if (!ri)
 		return NULL;
 	if (n == 0)