--- a/src/node/ipv4-address.cc	Thu May 28 20:16:56 2009 +0200
+++ b/src/node/ipv4-address.cc	Thu May 28 21:37:25 2009 -0700
@@ -55,6 +55,7 @@
 
 namespace ns3 {
 
+  
 Ipv4Mask::Ipv4Mask ()
   : m_mask (0x66666666)
 {}