[pLog-svn] Do we allowed blogCategory = null in blog Info?

[Mark Wu]

> 
> Can we just set it to zero? Either that, or we modify the db 
> schema to allow nulls.
> 
> I don't think we should force people to select a blog 
> category, it just doesn't make any sense for one or two person blogs.
> 
> Oscar

I see. How about I modify the following template and assign them the default
value:

1. NewPosts
2. AdminEditBlogs
3. Summay/Register

It won't impact anything... It also won't impact the current UI behavior... 

So, user does need to choose those value everytime.

Mark