Fix issue #39 Int16 null string writing 4 bytes
Fix issue #39 Int16 null string writing 4 bytes

Jroland/kafka-net,EranOfer/KafkaNetClient,geffzhang/kafka-net,CenturyLinkCloud/kafka-net,martijnhoekstra/kafka-net,gigya/KafkaNetClient,nightkid1027/kafka-net,BDeus/KafkaNetClient,PKRoma/kafka-net,bridgewell/kafka-net