patch applied (ghc): in CmmExpr, always have (Show GlobalReg), regardless of DEBUG setting

[nr at eecs.harvard.edu]

Fri Sep  7 06:24:17 PDT 2007  Norman Ramsey <nr at eecs.harvard.edu>
  * in CmmExpr, always have (Show GlobalReg), regardless of DEBUG setting

    M ./compiler/cmm/CmmExpr.hs -5 +1