StgCmmExpr: Remove a redundant list

compiler/codeGen/StgCmmExpr.hs

@@ -404,7 +404,7 @@ cgCase (StgApp v []) bndr alt_type@(PrimAlt _) alts
        ; v_info <- getCgIdInfo v
        ; emitAssign (CmmLocal (idToReg dflags (NonVoid bndr)))
                     (idInfoToAmode v_info)
-       ; bindArgsToRegs [NonVoid bndr]
+       ; bindArgToReg (NonVoid bndr)
        ; cgAlts (NoGcInAlts,AssignedDirectly) (NonVoid bndr) alt_type alts }
   where
     reps_compatible = idPrimRep v == idPrimRep bndr