add Packet.keyFrame

Author: pquiring

src/javaforce/voip/Packet.java

@@ -21,6 +21,7 @@ public Packet(byte[] data, int offset, int length) {
 
   public int stream;
   public long ts;
+  public boolean keyFrame;
 
   public String toString() {
     return "Packet:{data:" + data + ",offset:" + offset + ",length:" + length + "}";