[NETFILTER]: nf_nat_sip: only perform RTP DNAT if SIP session was SNATed

DNAT of the the RTP session is only necessary if the SIP session has
been SNATed.

Signed-off-by: Jerome Borsboom <[email protected]>
Signed-off-by: Patrick McHardy <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
1 file changed