Trivial patch, spelling typo in comment

Trivial patch, spelling typo in comment

[Will Dietz]

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Attached, but feel free to fix however; no credit needed. Just
happened to notice :).

~Will

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From 0f41d57ebe820b5da14d1b1284ee20970c6a611a Mon Sep 17 00:00:00 2001
From: Will Dietz <w@wdtz.org>
Date: Wed, 18 Apr 2018 16:17:44 -0500
Subject: [PATCH] setvbuf: minor typo fix, lockign -> locking

---
 src/stdio/setvbuf.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/stdio/setvbuf.c b/src/stdio/setvbuf.c
index 0a0c139f..b6b9b018 100644
--- a/src/stdio/setvbuf.c
+++ b/src/stdio/setvbuf.c
@@ -1,7 +1,7 @@
 #include "stdio_impl.h"
 
 /* The behavior of this function is undefined except when it is the first
- * operation on the stream, so the presence or absence of lockign is not
+ * operation on the stream, so the presence or absence of locking is not
  * observable in a program whose behavior is defined. Thus no locking is
  * performed here. No allocation of buffers is performed, but a buffer
  * provided by the caller is used as long as it is suitably sized. */
-- 
2.17.0