Update src/app/tasks.coffee

20/02/13 Added a check for undefined value, more at https://github.com/lefnire/habitrpg/issues/463 -lancemanfv
Merge pull request #464 from lancemanfv/master

Issue #463 fix (adding empty tasks)
Update src/app/items.coffee
Update src/app/items.coffee
Merge branch 'master' of github.com:lefnire/habitrpg
test '_userId' instead of session.userId
test '_userId' instead of session.userId
Merge branch 'master' into develop