final and null check

core/java/src/net/i2p/util/LogLimit.java

@@ -14,7 +14,7 @@ package net.i2p.util;
  *
  */
 class LogLimit {
-    private String _rootName;
+    private final String _rootName;
     private int _limit;
 
     public LogLimit(String name, int limit) {

core/java/src/net/i2p/util/LogRecordFormatter.java

@@ -60,7 +60,9 @@ class LogRecordFormatter {
                 buf.append(getPriority(rec, manager.getContext()));
                 break;
             case LogManager.MESSAGE:
-                buf.append(getWhat(rec));
+                String msg = getWhat(rec);
+                if (msg != null)
+                    buf.append(msg);
                 break;
             default:
                 buf.append(format[i]);