Auto merge of #157 - alexsult:master, r=mrmonday
Auto merge of #157 - alexsult:master, r=mrmonday

removing a uselesss println

I forget to remove a useless println from the ipv4.rs file.

symphorien/libpnet,symphorien/libpnet,libpnet/libpnet,libpnet/libpnet,libpnet/libpnet,libpnet/libpnet,mrmonday/libpnet,symphorien/libpnet,symphorien/libpnet,mrmonday/libpnet,fsck/libpnet,fsck/libpnet,mrmonday/libpnet,mrmonday/libpnet,fsck/libpnet,fsck/libpnet