Add two KASSERTs.
Add two KASSERTs.

Suggested in
https://bugzilla.mozilla.org/show_bug.cgi?id=1227055

weinrank/usrsctp,CoolmanCZ/usrsctp,faithfracture/usrsctp,faithfracture/usrsctp,JlnWntr/usrsctp,CoolmanCZ/usrsctp,sctplab/usrsctp,CoolmanCZ/usrsctp,sctplab/usrsctp,weinrank/usrsctp,faithfracture/usrsctp,JlnWntr/usrsctp,sctplab/usrsctp,weinrank/usrsctp,JlnWntr/usrsctp,CoolmanCZ/usrsctp