rename a local variable to reduce possible confusion
rename a local variable to reduce possible confusion

refs #91  Registration protocol in ccnd

cawka/ndnx,svartika/ccnx,svartika/ccnx,cawka/ndnx,svartika/ccnx,ebollens/ccnmp,svartika/ccnx,ebollens/ccnmp,svartika/ccnx,cawka/ndnx,cawka/ndnx,cawka/ndnx,svartika/ccnx,svartika/ccnx,ebollens/ccnmp,ebollens/ccnmp