Cherrypick upstream OpenBSD's vfwprintf.c revision 1.11.

revision 1.11
date: 2014/06/04 07:45:25;  author: stsp;  state: Exp;  lines: +1 -7;  commitid:
 zJPRH5RUO224FmQu;
Remove assigned but unused local variables and macro from vfwprintf().
Found by Elliott @ google
ok mpi@

Change-Id: I716edc0c4d736a484a5317942de8e87bd8c6fd26

libc/Android.mk

@@ -709,7 +709,6 @@ LOCAL_CFLAGS := \
     $(libc_common_cflags) \
     -Wno-sign-compare -Wno-uninitialized -Wno-unused-parameter \
     -Werror \
-    -Wno-error=unused-but-set-variable \
     -I$(LOCAL_PATH)/upstream-openbsd/android/include \
     -I$(LOCAL_PATH)/upstream-openbsd/lib/libc/include \
     -I$(LOCAL_PATH)/upstream-openbsd/lib/libc/gdtoa/ \

libc/upstream-openbsd/lib/libc/stdio/vfwprintf.c

@@ -1,4 +1,4 @@
-/*	$OpenBSD: vfwprintf.c,v 1.10 2014/05/03 12:36:45 deraadt Exp $ */
+/*	$OpenBSD: vfwprintf.c,v 1.11 2014/06/04 07:45:25 stsp Exp $ */
 /*-
  * Copyright (c) 1990 The Regents of the University of California.
  * All rights reserved.
@@ -324,9 +324,6 @@ __vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap)
 	int realsz;		/* field size expanded by dprec */
 	int size;		/* size of converted field or string */
 	const char *xdigs;	/* digits for %[xX] conversion */
-#define NIOV 8
-	struct __suio uio;	/* output information: summary */
-	struct __siov iov[NIOV];/* ... and individual io vectors */
 	wchar_t buf[BUF];	/* buffer with space for digits of uintmax_t */
 	wchar_t ox[2];		/* space for 0x; ox[1] is either x, X, or \0 */
 	union arg *argtable;	/* args, built due to positional arg */
@@ -463,9 +460,6 @@ __vfwprintf(FILE * __restrict fp, const wchar_t * __restrict fmt0, __va_list ap)
 	argtable = NULL;
 	nextarg = 1;
 	va_copy(orgap, ap);
-	uio.uio_iov = iov;
-	uio.uio_resid = 0;
-	uio.uio_iovcnt = 0;
 	ret = 0;
 	convbuf = NULL;