Did Snape have a life debt to James?

[johnryanmcc]

No: HPFGUIDX 42307

I was wondering what people thought about this.  Since James saved 
Snape from the Willow tree, did Snape owe James like Pettigrew owes 
Harry? Several different people stated James saved Snapes life 
throughout a couple of the books.  Maybe that's another reason he 
hated James.  Maybe it's why Dumbledore trusts him.  Who knows?  Any 
thoughts on this would be appreciated, Thanks.

John McCutcheon