There is a NullPointerException need fix.

[liya7907]

java.lang.RuntimeException: Fatal error while executing protocol 'c': java.lang.NullPointerException:
Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
at org.fourthline.cling.protocol.c.run(ReceivingAsync.java:78)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1133)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:607)
at java.lang.Thread.run(Thread.java:761)

Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'int java.lang.Integer.intValue()' on a null object reference
at org.fourthline.cling.registry.i.a(RemoteItems.java:140)
at org.fourthline.cling.registry.d.a(RegistryImpl.java:177)
at org.fourthline.cling.protocol.a.c.d(ReceivingSearchResponse.java:67)
at org.fourthline.cling.protocol.c.run(ReceivingAsync.java:71)
... 3 more