Fix typo in node-sln-client.
Fix typo in node-sln-client.

rmoorman/stronglink,Ryezhang/stronglink,Lacra17/stronglink,rmoorman/stronglink,shaunstanislaus/stronglink,nkatsaros/stronglink,shaunstanislaus/stronglink,yamingd/stronglink,guiquanz/stronglink,btrask/stronglink,feld/stronglink,nkatsaros/stronglink,Lacra17/stronglink,btrask/stronglink,nkatsaros/stronglink,shaunstanislaus/stronglink,guiquanz/stronglink,guiquanz/stronglink,Lacra17/stronglink,yamingd/stronglink,iOSCowboy/stronglink,yamingd/stronglink,Ryezhang/stronglink,btrask/stronglink,iOSCowboy/stronglink,rmoorman/stronglink,feld/stronglink,feld/stronglink,iOSCowboy/stronglink,Ryezhang/stronglink,btrask/stronglink