unused member

* vsnprintf.c (__sFILE): _lbfsize is not used.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58853 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

vsnprintf.c

@@ -175,7 +175,9 @@ typedef	struct __sFILE {
 	short	_flags;		/* flags, below; this FILE is free if 0 */
 	short	_file;		/* fileno, if Unix descriptor, else -1 */
 	struct	__sbuf _bf;	/* the buffer (at least 1 byte, if !NULL) */
+#if 0
 	size_t	_lbfsize;	/* 0 or -_bf._size, for inline putc */
+#endif
 	int	(*vwrite)(/* struct __sFILE*, struct __suio * */);
 	const char *(*vextra)(/* struct __sFILE*, size_t, void*, long*, int */);
 } FILE;