Now cancels current path when exiting Replay Viewer

Disabled opening the inventory while in the Replay Viewer

src/main/java/eu/crushedpixel/replaymod/replay/ReplaySender.java

@@ -402,6 +402,8 @@ public class ReplaySender extends ChannelInboundHandlerAdapter {
 
 		try {
 			Packet p = ReplayFileIO.deserializePacket(ba);
+			
+			if(p == null) return;
 
 			//If hurrying, ignore some packets, unless during Replay Path and *not* in initial hurry
 			if(hurryToTimestamp && (!ReplayHandler.isInPath() || (desiredTimeStamp-currentTimeStamp > 1000))) {