Minor clean up

Author: cowtowncoder

src/main/java/com/fasterxml/jackson/databind/ser/impl/MapEntryAsPOJOSerializer.java

@@ -37,10 +37,8 @@ public void serialize(Entry<?, ?> value, JsonGenerator gen, SerializerProvider c
             throws IOException
     {
         gen.writeStartObject(value);
-        gen.writeFieldName("key");
-        ctxt.defaultSerializeValue(value.getKey(), gen);
-        gen.writeFieldName("value");
-        ctxt.defaultSerializeValue(value.getValue(), gen);
+        ctxt.defaultSerializeField("key",value.getKey(), gen);
+        ctxt.defaultSerializeField("value", value.getValue(), gen);
         gen.writeEndObject();
     }
 }