[changeset] - bug and fix for surfnorm()

[John W. Eaton]

On 20-Oct-2008, Ben Abbott wrote:

| The reason I was concerned about the old state was for a special case  
| where oldh==h and an error occurred after "hold on". In such an event,  
| I thought it appropriate to restore oldh to its original hold state.
| 
| Does that make sense, or have I missed something that makes such an  
| event impossible?

I think that is handled by my change because the code in the
undwind_protect_cleanup block is always executed.

jwe