checkstyle fixes

Change-Id: Ida02536e61f61b8883810866d28bdaad206f645d
diff --git a/utils/netty/src/main/java/org/onlab/netty/MessageDecoder.java b/utils/netty/src/main/java/org/onlab/netty/MessageDecoder.java
index c957153..51f8dd3 100644
--- a/utils/netty/src/main/java/org/onlab/netty/MessageDecoder.java
+++ b/utils/netty/src/main/java/org/onlab/netty/MessageDecoder.java
@@ -50,7 +50,7 @@
             ByteBuf buffer,
             List<Object> out) throws Exception {
 
-        switch(state()) {
+        switch (state()) {
         case READ_HEADER_VERSION:
             int headerVersion = buffer.readInt();
             checkState(headerVersion == MessageEncoder.HEADER_VERSION, "Unexpected header version");