rtmGetTasks errors when filter does not match any tasks

[amcameron]

Steps to reproduce:
Create a task which:

1. sets %filter to a value returning no tasks from your RTM account;
2. calls rtmGetTasks with a JavaScript action.

Expected behaviour:
Following the JavaScript call to rtmGetTasks, the rest of the Task should execute with %tasks unset, or possibly set to an empty string.

Actual behaviour:
A toast notification appears saying, "JavaScriptlet: line 2: Uncaught TypeError: Cannot read property 'length' of undefined". This Javascript error causes premature termination of the Tasker task.

[dansteen]

Hm. I'll take a look.