patch applied (ghc): Add and use seqBitmap when constructing SRTs

[Simon Marlow]

Ian Lynagh wrote:
> Wed Feb 27 06:45:05 PST 2008  Ian Lynagh <igloo at earth.li>
>   * Add and use seqBitmap when constructing SRTs
>   This roughly halves memory usage when compiling
>       module Foo where
>   
>       foo :: Double -> Int
>       foo x | x == 1 = 1
>       ...
>       foo x | x == 500 = 500
>   without optimisation.

Good catch!

Simon