Fri Sep 22 11:57:11 PDT 2006 simonpj at microsoft.com
* Add a crucial missing prime in tcConPat
This fixes a typo -- a missing prime in tcConPat.
The test is gadt18.
While modifying TcPat I also trimmed imports, fixed non-exhaustive
patterns, and improved tracing.
M ./compiler/typecheck/TcPat.lhs -7 +13