[NETFILTER]: Export ip_nat_port_{nfattr_to_range,range_to_nfattr}

Those exports are needed by the PPTP helper following in the next
couple of changes.

Signed-off-by: Harald Welte <[e-mail]>
Signed-off-by: David S. Miller <[e-mail]>

net/ipv4/netfilter/ip_nat_core.c

···
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(ip_nat_port_nfattr_to_range);
+EXPORT_SYMBOL_GPL(ip_nat_port_range_to_nfattr);
 #endif
 
 int __init ip_nat_init(void)