Fix typo which breaks Windows builds.
Fix typo which breaks Windows builds.

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