fixed crash on self-tips
fixed crash on self-tips

unek/node-tip-bot,Fuzzbawls/node-tip-bot,unek/node-tip-bot,Fuzzbawls/node-tip-bot,Biersteker/node-tip-bot-twitter,framewr/node-tip-bot,jwinterm/node-tip-bot,framewr/node-tip-bot,Biersteker/node-tip-bot-twitter,jwinterm/node-tip-bot