Fix byte order

which fixes port conflict

Reported-by: Steven Haber

Fixes #92
diff --git a/src/misc.h b/src/misc.h
index 39fe367..ff50e79 100644
--- a/src/misc.h
+++ b/src/misc.h
@@ -12,7 +12,7 @@
     SlirpWriteCb write_cb;
     void *opaque;
     struct in_addr ex_addr; /* Server address */
-    int ex_fport; /* Port to telnet to */
+    int ex_fport; /* Port to telnet to (network order) */
     char *ex_exec; /* Command line of what to exec */
     char *ex_unix; /* unix socket */
     struct gfwd_list *ex_next;
diff --git a/src/slirp.c b/src/slirp.c
index a84d6e4..8c7cb5e 100644
--- a/src/slirp.c
+++ b/src/slirp.c
@@ -1589,7 +1589,7 @@
 
     /* check if the port is "bound" */
     for (tmp_ptr = slirp->guestfwd_list; tmp_ptr; tmp_ptr = tmp_ptr->ex_next) {
-        if (guest_port == tmp_ptr->ex_fport &&
+        if (guest_port == ntohs(tmp_ptr->ex_fport) &&
             guest_addr->s_addr == tmp_ptr->ex_addr.s_addr)
             return false;
     }