don't override variables which pkgsrc already sets in MAKE_ENV.

fixes build on Solaris.

security/tripwire/distinfo

@@ -1,8 +1,8 @@
-$NetBSD: distinfo,v 1.8 2003/12/09 19:17:37 ben Exp $
+$NetBSD: distinfo,v 1.9 2004/02/08 13:36:20 grant Exp $
 
 SHA1 (tripwire-1.2.tar.gz) = 6fc91e25b3e1af3881fd5b6acf240ab6c1133e38
 Size (tripwire-1.2.tar.gz) = 299831 bytes
-SHA1 (patch-aa) = 37e41b99fbd437cc62b1446545f963d03e91e819
+SHA1 (patch-aa) = 2a03c5970becef18d0b655cc5e91a1db070111f8
 SHA1 (patch-ab) = 186edaa504e6e1a7edadb2168982b9b8a2482bac
 SHA1 (patch-ac) = 35b3fe52f497e6cbbf7edfeaee398f0d24aff219
 SHA1 (patch-ad) = 4b8ad8d0cd7c17a8f3a655c5a574856670533ea5

security/tripwire/patches/patch-aa

@@ -1,9 +1,7 @@
-$NetBSD: patch-aa,v 1.3 1999/05/31 04:10:32 ross Exp $
+$NetBSD: patch-aa,v 1.4 2004/02/08 13:36:20 grant Exp $
 
-Miscellaneous Makefile settings.
-
---- Makefile	1994/07/25 15:59:41	1.16
-+++ Makefile	1998/11/17 13:44:39
+--- Makefile.orig	1994-07-26 01:59:41.000000000 +1000
++++ Makefile
 @@ -12,10 +12,10 @@
  ###
  
@@ -17,27 +15,39 @@ Miscellaneous Makefile settings.
  
  # system utilities
  LEX	= lex
-@@ -32,8 +32,8 @@
+@@ -32,11 +32,11 @@ SHELL	= /bin/sh
  #SHELL	= /bin/bash		# For the GNU fanatics
  
  # you can use ANSI C if you like, but K&R is equally fine.
 -CC     = cc			# common
--#CC     = gcc			# also common
 +#CC     = cc			# common
-+CC     = gcc			# also common
+ #CC     = gcc			# also common
  #CC	= /usr/ccs/bin/cc	# Pyramid DC/OSx (SVR4)
  
- CFLAGS = -O			# common 
-@@ -48,7 +48,7 @@
- #CFLAGS = -systype bsd43	# ETA/10 (SVR3)
- #CFLAGS = -systype bsd43	# MIPS RISC/OS 4.5x
- #CFLAGS = -O -ansi		# gnu CC
--#CFLAGS = -O -ansi -W -Wreturn-type -Wswitch -Wshadow # gnu CC w/all warnings
-+CFLAGS = -O -ansi -W -Wreturn-type -Wswitch -Wshadow -DTW_TYPE32='int'
- #CFLAGS = -OG			# Pyramid OSx
- #CFLAGS = -O -Kold		# Pyramid DC/OSx (SVR4)
- #CFLAGS = -DTW_TYPE32='int'	# DEC OSF/1 Alpha (or any other architecture
-@@ -77,7 +77,7 @@
+-CFLAGS = -O			# common 
++#CFLAGS = -O			# common 
+ #CFLAGS = -g 			# common 
+ #CFLAGS = -g			# debugging
+ #CFLAGS = -O -cckr		# SGI
+@@ -55,7 +55,7 @@ CFLAGS = -O			# common 
+                           	# where int [but not long] is a 32 bit quantity)
+ 
+ # a C preprocessor (to build inode.h)
+-CPP	= $(CC) -E			# common
++#CPP	= $(CC) -E			# common
+ #CPP	= /usr/lib/cpp		# on older systems
+ #CPP	= /lib/cpp		# on older systems
+ 
+@@ -67,7 +67,7 @@ LDFLAGS=			# common
+ #LDFLAGS= -dn			# Pyramid DC/OSx (SVR4)
+ 
+ # libraries
+-LIBS = 				# common
++#LIBS = 				# common
+ #LIBS = -lsocket                # SCO
+ #LIBS = -lmalloc -lsun -lc_s	# IRIX 4.0
+ #LIBS = -lx			# Xenix
+@@ -77,7 +77,7 @@ LIBS = 				# common
  
  # If you don't have the install command, you need to replace
  # the use of it later in the makefile with a cp and chmod