linkedin/dustjs — pull request #252 by zaphod1984 (2013-03-25 13:41:11+00:00)
Title: unspecified parameters result in null value

these pull requests changes the standard value of the params parameters for block contexts to an empty object instead of an null value.

this helper will break _on runtime_ if someone is doing an error when creating a template that uses that helper.
```
dust.helpers.myHelper = function(chunk, context, bodies, parameters) {
return chunk.write(parameters.type);
};
```