Sonar suggestion - don't use bit operator in a boolean expression

Change-Id: I69e254ffea0c72a040077d6e6a13c326d44c1197
diff --git a/utils/misc/src/main/java/org/onlab/packet/PacketUtils.java b/utils/misc/src/main/java/org/onlab/packet/PacketUtils.java
index d4ec84d..81b06e0 100644
--- a/utils/misc/src/main/java/org/onlab/packet/PacketUtils.java
+++ b/utils/misc/src/main/java/org/onlab/packet/PacketUtils.java
@@ -39,7 +39,7 @@
     public static void checkBufferLength(int byteLength, int offset, int length)
             throws DeserializationException {
         boolean ok = (offset >= 0 && offset < byteLength);
-        ok = ok & (length >= 0 && offset + length <= byteLength);
+        ok = ok && (length >= 0 && offset + length <= byteLength);
 
         if (!ok) {
             throw new DeserializationException("Unable to read " + length + " bytes from a "