Fix logic error. Spotted by cpp-check.
Fix logic error. Spotted by cpp-check.

sctplab/usrsctp,weinrank/usrsctp,CoolmanCZ/usrsctp,sctplab/usrsctp,CoolmanCZ/usrsctp,CoolmanCZ/usrsctp,sctplab/usrsctp,weinrank/usrsctp,CoolmanCZ/usrsctp,weinrank/usrsctp