increase TMP_MAX to the equivalent of INT_MAX. it's actually more,

but safer not to wraparound by accident.
ok deraadt millert miod

src/include/limits.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: limits.h,v 1.18 2013/03/01 21:16:34 guenther Exp $	*/
+/*	$OpenBSD: limits.h,v 1.19 2015/01/20 22:09:50 tedu Exp $	*/
 /*	$NetBSD: limits.h,v 1.7 1994/10/26 00:56:00 cgd Exp $	*/
 
 /*
@@ -96,7 +96,7 @@
 #if __XPG_VISIBLE
 # if __XPG_VISIBLE < 600
 #  define PASS_MAX		128	/* _PASSWORD_LEN from <pwd.h> */
-#  define TMP_MAX		308915776
+#  define TMP_MAX		0x7fffffff /* more, but don't overflow int */
 # endif
 
 # if __XPG_VISIBLE < 700

src/include/stdio.h

@@ -1,4 +1,4 @@
-/*	$OpenBSD: stdio.h,v 1.49 2014/03/27 15:28:16 tedu Exp $	*/
+/*	$OpenBSD: stdio.h,v 1.50 2015/01/20 22:09:50 tedu Exp $	*/
 /*	$NetBSD: stdio.h,v 1.18 1996/04/25 18:29:21 jtc Exp $	*/
 
 /*-
@@ -191,7 +191,7 @@ __END_DECLS
 #define	P_tmpdir	"/tmp/"
 #endif
 #define	L_tmpnam	1024	/* XXX must be == PATH_MAX */
-#define	TMP_MAX		308915776
+#define	TMP_MAX		0x7fffffff	/* more, but don't overflow int */
 
 #ifndef SEEK_SET
 #define	SEEK_SET	0	/* set file offset to offset */