small forwards-compatibility improvement for ReferenceTypeDeserializer

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/deser/std/ReferenceTypeDeserializer.java

@@ -7,6 +7,7 @@
 
 import com.fasterxml.jackson.databind.*;
 import com.fasterxml.jackson.databind.deser.ContextualDeserializer;
+import com.fasterxml.jackson.databind.deser.ValueInstantiator;
 import com.fasterxml.jackson.databind.jsontype.TypeDeserializer;
 import com.fasterxml.jackson.databind.type.ReferenceType;
 
@@ -48,6 +49,12 @@ public ReferenceTypeDeserializer(JavaType fullType,
         _valueTypeDeserializer = typeDeser;
     }
 
+    // NOTE: for forwards-compatibility; added in 2.8.5 since 2.9.0 has it
+    public ReferenceTypeDeserializer(JavaType fullType, ValueInstantiator inst,
+            TypeDeserializer typeDeser, JsonDeserializer<?> deser) {
+        this(fullType, typeDeser, deser);
+    }
+
     @Override
     public JsonDeserializer<?> createContextual(DeserializationContext ctxt, BeanProperty property) throws JsonMappingException
     {