removing the mongo node from mup.js results in this error

[reduxdj]

Not sure what's happened here... but if I set setupMongo: 0, and the remove the mongo node, the setup still tries to install mongo

Setup Environment
TypeError: Cannot read property 'host' of undefined
at Object.setup (index.js:33:15)
at index.js:52:15
at run (/Users/Patrick/meteor-up/node_modules/babel-polyfill/node_modules/core-js/modules/es6.promise.js:104:47)
at /Users/Patrick_/meteor-up/node_modules/babel-polyfill/node_modules/core-js/modules/es6.promise.js:115:28
at flush (/Users/Patrick_/meteor-up/node_modules/babel-polyfill/node_modules/core-js/modules/$.microtask.js:19:5)
at nextTickCallbackWith0Args (node.js:419:9)
at process._tickCallback (node.js:348:13)

[madushan1000]

This is a duplicate of issue #34, addressed by PR #41