Fix configure test that uses 'main()' instead of 'int main(void)'.

Because of this the return type of random(3) is misdetected and the
build later fails on ports-gcc because the the local random() stub
clashes with the prototype from <stdlib.h>.
Bump REVISION.

net/ns/Makefile

@@ -3,7 +3,7 @@ COMMENT=	UCB/LBNL Network Simulator Version 2
 V=		2.35
 DISTNAME=	ns-src-$V
 PKGNAME=	ns-$V
-REVISION =	7
+REVISION =	8
 CATEGORIES=	net
 MAINTAINER =	Stuart Cassoff <stwo@users.sourceforge.net>
 

net/ns/patches/patch-configure_in

@@ -0,0 +1,12 @@
+Index: configure.in
+--- configure.in.orig
++++ configure.in
+@@ -52,7 +52,7 @@ touch confdefs.h
+ AC_TRY_RUN([#include <stdlib.h>
+ #include "confdefs.h"
+ long random() { return 1; }
+-main() { exit(0); }
++int main(void) { exit(0); }
+ ],
+ AC_MSG_RESULT(long)
+ AC_DEFINE(RANDOM_RETURN_TYPE,long)