Use correct template parameters when casting RHS of operator comparison.

src/compiler/operator.h

Index: src/compiler/operator.h
diff --git a/src/compiler/operator.h b/src/compiler/operator.h
index 5b15b9728916dc76aaeea209e0cdefcdf6e511f4..ef30f9e90eb88e84cd8a9782728600499a2105d9 100644
--- a/src/compiler/operator.h
+++ b/src/compiler/operator.h
@@ -155,7 +155,7 @@ class Operator1 : public Operator {
 
   bool Equals(const Operator* other) const final {
     if (opcode() != other->opcode()) return false;
-    const Operator1<T>* that = reinterpret_cast<const Operator1<T>*>(other);
+    auto* that = reinterpret_cast<const Operator1<T, Pred, Hash>*>(other);
     return this->pred_(this->parameter(), that->parameter());
   }
   size_t HashCode() const final {