freqz produces incorrect output

[John W. Eaton]

On 24-Dec-2008, Ben Abbott wrote:

| 
| On Dec 24, 2008, at 4:21 PM, Frederick_Umminger at playstation.sony.com  
| wrote:
| 
| > I believe the following code fixes the problem. I apologize for it  
| > not being a diff.
| >
| > -Frederick
| 
| I've attached a changeset attributed to you.
| 
| Before being committed, I think a new test show be added.
| 
| Fredrick can you propose a simple script that tests your change?

Even with this patch, the phase plot looks strange.  Is it correct?

jwe