Fixed handling of polymorphic array accesses with constant index

src/property-details.h

Index: src/property-details.h
diff --git a/src/property-details.h b/src/property-details.h
index 3405bd904a7bc97dcbfc7afd04d96d6a3237b3b8..01050dbd4fe043f1f557ed1477577f7f19e78c05 100644
--- a/src/property-details.h
+++ b/src/property-details.h
@@ -148,6 +148,8 @@ class Representation {
     return other.is_more_general_than(*this) || other.Equals(*this);
   }
 
+  bool CanContainDouble(double value);
+
   Representation generalize(Representation other) {
     if (other.fits_into(*this)) return *this;
     if (other.is_more_general_than(*this)) return other;