Minor bug fix

Author: vietj

vertx-db2-client/src/main/java/io/vertx/db2client/impl/codec/CloseStatementDB2CommandMessage.java

@@ -27,6 +27,7 @@ class CloseStatementDB2CommandMessage extends DB2CommandMessage<Void, CloseState
 
   @Override
   void encode(DB2Encoder encoder) {
+    super.encode(encoder);
     DB2PreparedStatement statement = (DB2PreparedStatement) cmd.statement();
     statement.close();
     fireCommandSuccess(null);

vertx-db2-client/src/main/java/io/vertx/db2client/impl/codec/DB2Encoder.java

@@ -76,9 +76,10 @@ <R> void fireCommandSuccess(DB2CommandMessage msg, R result) {
   @SuppressWarnings({ "unchecked", "rawtypes" })
   void write(DB2CommandMessage<?, ?> msg) {
     try {
-      msg.encode(this);
       inflight.add(msg);
+      msg.encode(this);
     } catch (Throwable e) {
+      inflight.pollLast();
       LOG.error("FATAL: Unable to encode command: " + msg, e);
       chctx.fireChannelRead(CommandResponse.failure(e));
     }