fix to work with harmony transform

specifically the transform of
```
require('node-jsx').install({harmony: true})
```

the error thrown was 
```
Error: Error transforming mystuff/node_modules/express/node_modules/methods/index.js to JSX: Error: Parse Error: Line 9: Illegal return statement
```
and i think the return was illegal as it was not in a function.

cheers!