Fix NodeDownload

src/de/steamwar/sql/NodeDownload.java

@@ -63,7 +63,7 @@ public class NodeDownload {
     public static String base16encode(byte[] byteArray) {
         StringBuilder hexBuffer = new StringBuilder(byteArray.length * 2);
         for (byte b : byteArray)
-            hexBuffer.append(HEX[b >>> 4]).append(HEX[b & 0xF]);
+            hexBuffer.append(HEX[(b >>> 4) & 0xF]).append(HEX[b & 0xF]);
         return hexBuffer.toString();
     }
 }