This fix an error about the function `tun_close` in n2n_v2(r7394 tested) when compiling on OS X

n2n_v2_osx_fix.diff

If you see the error message below, you may need this patch:
  Undefined symbols for architecture x86_64:
    "_tun_close", referenced from:
        _tuntap_open in n2n.a(tuntap_osx.o)
  ld: symbol(s) not found for architecture x86_64


# How to use
If you got the source code from official repository, like me:
  svn co https://svn.ntop.org/svn/ntop/trunk/n2n

Go to the folder of n2n_v2
  cd n2n/n2n_v2

Apply this patch
  patch < /path_to/n2n_v2_osx_fix.diff

And enjoy your make :D
  make


Index: tuntap_osx.c
===================================================================
--- tuntap_osx.c	(revision 7394)
+++ tuntap_osx.c	(working copy)
@@ -19,7 +19,7 @@

 #ifdef _DARWIN_

-void tun_close(tuntap_dev *device);
+//void tun_close(tuntap_dev *device);

 /* ********************************** */

@@ -77,7 +77,7 @@

     fd = popen(buf, "r");
     if(fd < 0) {
-      tun_close(device);
+      tuntap_close(device);
       return(-1);
     } else {
       int a, b, c, d, e, f;