[commit][obv] Use TYPE_LENGTH directly where possible

[Siddhesh Poyarekar]

On Wed, 26 Sep 2012 15:58:55 +0100, Pedro wrote:
> 
> I agree with Joel, and was also silently glumbling.  :-)
> 

OK, should I go ahead and revert the patch as is or do you want me to
post it for review first?

Regards,
Siddhesh