Typo in Section 4.2 of the spec

[krish7919]

Was going through the new draft and just saw this:

4.2.  Multi-Signature
   ...
   That said, it is important that implementations must inspect the ypes and subtypes of any crypto-
   conditions they encounter to ensure they do not pass on a condition they will not be able to verify 
   at a later stage.
   ...

ypes should be types.

[adrianhopebailie]

Fixed