Add a type signature to help GHC 6.4

Needed in lieu of -XRelaxedPolyRec

diff --git a/compiler/cmm/ZipDataflow.hs b/compiler/cmm/ZipDataflow.hs
index f09368d..1cb222f 100644 (file)
--- a/compiler/cmm/ZipDataflow.hs
+++ b/compiler/cmm/ZipDataflow.hs
@@ -448,6 +448,9 @@ forward_rew check_maybe return_graph = forw
                   ; a <- finish
                   ; return (a, g, fuel)
                   }
+          inner_rew :: DFM a b
+                    -> a -> Graph m l -> Fuel
+                    -> DFM a (b, Graph m l, Fuel)
           inner_rew = case depth of RewriteShallow -> don't_rewrite
                                     RewriteDeep -> rewrite emptyBlockEnv
           fixed_pt_and_fuel =