when raising monitor event or error dont create the callback args if there is no callback
when raising monitor event or error dont create the callback args if there is no callback

tempbottle/zeromq.node,ValYouW/zeromq.node,panuhorsmalahti/zeromq.node,rgbkrk/zmq-prebuilt,interpretor/zeromq.js,rgbkrk/zmq-prebuilt,JustinTulloss/zeromq.node,interpretor/zeromq.js,JustinTulloss/zeromq.node,GrabCAD/zeromq.node,reqshark/zeromq.node,GrabCAD/zeromq.node,lablup/zeromq.node,rgbkrk/zmq-prebuilt,JustinTulloss/zeromq.node,reunanen/zeromq.node,hhamilto/zeromq.node,tempbottle/zeromq.node,GrabCAD/zeromq.node,reqshark/zeromq.node,rgbkrk/zmq-prebuilt,ronkorving/zeromq.node,ronkorving/zeromq.node,rydn/zeromq.node,lgeiger/zmq-prebuilt,hhamilto/zeromq.node,panuhorsmalahti/zeromq.node,hhamilto/zeromq.node,rgbkrk/zmq-prebuilt,rydn/zeromq.node,reunanen/zeromq.node,ronkorving/node-zmq,lablup/zeromq.node,interpretor/zeromq.js,ronkorving/zeromq.node,rydn/zeromq.node,lablup/zeromq.node,lgeiger/zmq-prebuilt,ronkorving/node-zmq,lablup/zeromq.node,ronkorving/node-zmq,hhamilto/zeromq.node,reqshark/zeromq.node,tempbottle/zeromq.node,panuhorsmalahti/zeromq.node,ronkorving/node-zmq,interpretor/zeromq.js,lgeiger/zmq-prebuilt,lgeiger/zmq-prebuilt,reunanen/zeromq.node,rydn/zeromq.node,interpretor/zeromq.js,ValYouW/zeromq.node,JustinTulloss/zeromq.node,reqshark/zeromq.node,ronkorving/zeromq.node,panuhorsmalahti/zeromq.node,lgeiger/zmq-prebuilt,GrabCAD/zeromq.node,ValYouW/zeromq.node,ValYouW/zeromq.node,reunanen/zeromq.node,tempbottle/zeromq.node