patch applied (ghc): Fix and supress some warnings, and turn on -Werror when validating

[Ian Lynagh]

Sun Sep  2 12:39:18 PDT 2007  Ian Lynagh <igloo at earth.li>
  * Fix and supress some warnings, and turn on -Werror when validating

    M ./rts/Makefile +10
    M ./rts/Schedule.c -1 +6
    M ./utils/genapply/GenApply.hs +6
    M ./utils/genprimopcode/Parser.y +7
    M ./utils/hpc/HpcParser.y +7
    M ./validate -3 +5