:set -hide-package in ghci.conf crashes winghci on startup

```
What steps will reproduce the problem?
1. Add line ":set -hide-package monads-tf" to your ghci.conf
2. Run winghci

What is the expected output? What do you see instead?
The flag should be set on startup. Instead, program freezes.

What version of the product are you using? On what operating system?
winghci 1.0.6 from Haskell Platform 2013.2.0.0 on Windows 8.1.

Please provide any additional information below.
Setting the flag in prompt after winghci starts works well. After removing
problematic flag from ghci.conf, winghci starts properly. The same problem
occurs when hiding other packages.
```

Original issue reported on code.google.com by `xile...@gmail.com` on 5 Nov 2013 at 10:03