From: Rusty Russell <rusty@rustcorp.com.au>
Date: Wed, 31 Oct 2012 11:31:59 +0000 (+1030)
Subject: tlist: remove unused var warning in example.
X-Git-Url: https://git.ozlabs.org/?p=ccan;a=commitdiff_plain;h=919b97d6e573eb794d7819f1af8da29023d6b193

tlist: remove unused var warning in example.

Compiler:
/home/rusty/devel/cvs/ccan/ccan/tlist/tlist.h: In function ‘main’:
/home/rusty/devel/cvs/ccan/ccan/tlist/tlist.h:186:15: warning: variable ‘first’ set but not used [-Wunused-but-set-variable]

Compiler:
/home/rusty/devel/cvs/ccan/ccan/tlist/tlist.h: In function ‘main’:
/home/rusty/devel/cvs/ccan/ccan/tlist/tlist.h:205:15: warning: variable ‘last’ set but not used [-Wunused-but-set-variable]

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
---

diff --git a/ccan/tlist/tlist.h b/ccan/tlist/tlist.h
index 1ce0b85e..937a834c 100644
--- a/ccan/tlist/tlist.h
+++ b/ccan/tlist/tlist.h
@@ -185,6 +185,8 @@
  * Example:
  *	struct child *first;
  *	first = tlist_top(&parent->children, list);
+ *	if (!first)
+ *		printf("Empty list!\n");
  */
 #define tlist_top(h, member)						\
 	((tcon_type((h), canary))					\
@@ -202,6 +204,8 @@
  * Example:
  *	struct child *last;
  *	last = tlist_tail(&parent->children, list);
+ *	if (!last)
+ *		printf("Empty list!\n");
  */
 #define tlist_tail(h, member)						\
 	((tcon_type((h), canary))					\