[turbofan] Correctify TruncateFloat64ToInt32 reduction in MachineOperatorReducer.

src/compiler/machine-operator-reducer.h

Index: src/compiler/machine-operator-reducer.h
diff --git a/src/compiler/machine-operator-reducer.h b/src/compiler/machine-operator-reducer.h
index 11887f52004b0d4a00810fedbbeb1a49b68826d2..ba40f3fca9a0cb5648d9a8db31b6c1768844d06e 100644
--- a/src/compiler/machine-operator-reducer.h
+++ b/src/compiler/machine-operator-reducer.h
@@ -65,6 +65,7 @@ class MachineOperatorReducer FINAL : public Reducer {
   Reduction ReduceUint32Div(Node* node);
   Reduction ReduceInt32Mod(Node* node);
   Reduction ReduceUint32Mod(Node* node);
+  Reduction ReduceTruncateFloat64ToInt32Input(Node* input);
   Reduction ReduceTruncateFloat64ToInt32(Node* node);
   Reduction ReduceStore(Node* node);
   Reduction ReduceProjection(size_t index, Node* node);