Regression on 10-RC5 with a multicast routing daemon

Hi all,

I'm trying to port a PIM sparse-mode daemon (
https://github.com/troglobit/pimd/) and I've meet a problem:
This daemon compile and run fine on FreeBSD 9.2 but on 10-RC5 this daemon
can't understand received multicast packets (received from other PIM
neighbors) and display this kind of error message in debug mode "warning -
Received packet from 10.0.12.2 shorter (28 bytes) than hdr+data length
(20+28)".
How to troubleshoot this problem ?

My current work of this port can be tested with theses commands:

cd /usr/ports
fetch -o ports.pimd.shar "
https://sourceforge.net/p/bsdrp/code/HEAD/tree/trunk/BSDRP/patches/ports.pimd.shar?format=raw
"
sh ./ports.pimd.shar
cd net/pimd
make install