fix misspelling in the example of container_of

From 47c92fe951545e780ca31c598bbcbe5347059b27 Mon Sep 17 00:00:00 2001
From: Yubin Ruan <ablacktshirt@gmail.com>
Date: Mon, 12 Mar 2018 11:22:35 +0800
Subject: [PATCH] fix misspelling in the example of container_of
Signed-off-by: Yubin Ruan <ablacktshirt@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

ccan/check_type/check_type.h

@@ -43,7 +43,7 @@
  *	#define container_of(mbr_ptr, encl_type, mbr)			\
  *		(check_types_match((mbr_ptr), &((encl_type *)0)->mbr),	\
  *		 ((encl_type *)						\
- *		  ((char *)(mbr_ptr) - offsetof(enclosing_type, mbr))))
+ *		  ((char *)(mbr_ptr) - offsetof(encl_type, mbr))))
  */
 #if HAVE_TYPEOF
 #define check_type(expr, type)			\