patch applied (ghc): Make pragState call mkPState, rather than duplicating everything

[Ian Lynagh]

Tue Jul  6 10:30:07 PDT 2010  Ian Lynagh <igloo at earth.li>
  * Make pragState call mkPState, rather than duplicating everything
  This also means that extsBitmap gets set, whereas is was just being set
  to 0 before.

    M ./compiler/parser/Lexer.x -19 +3

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20100706173007-3fd76-a9b999d082100be88f484803b765113e5141c24a.gz