file->f_op is never NULL...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/fs/readdir.c b/fs/readdir.c
index 93d71e5..5b53d99 100644
--- a/fs/readdir.c
+++ b/fs/readdir.c
@@ -24,7 +24,7 @@
 {
 	struct inode *inode = file_inode(file);
 	int res = -ENOTDIR;
-	if (!file->f_op || !file->f_op->iterate)
+	if (!file->f_op->iterate)
 		goto out;
 
 	res = security_file_permission(file, MAY_READ);