P25 - work in progress - this is a fairly stable version of the P25 channel state. There is still work to do, but I'm going to release a test version based on this commit.

- Channel state now processes HDU, TDU, TDULC, PDU, PDULC, LDU1/2, LDULC

src/controller/activity/CallEvent.java

@@ -98,6 +98,11 @@ public abstract class CallEvent
 		return mFromID;
 	}
 	
+	public boolean hasFromID()
+	{
+		return mFromID != null;
+	}
+	
 	public void setFromID( String id )
 	{
 		mFromID = id;
@@ -108,6 +113,11 @@ public abstract class CallEvent
 		return mToID;
 	}
 	
+	public boolean hasToID()
+	{
+		return mToID != null;
+	}
+	
 	public void setToID( String id )
 	{
 		mToID = id;