Wrong dictionary NPE guard #151

core/jdiameter/impl/src/main/java/org/jdiameter/client/impl/fsm/PeerFSMImpl.java:343
contains diameter != null, but at the previous line ValidatorLevel incomingLevel = dictionary.getReceiveLevel();. It's not a problem, until dictionary is a singleton, but may produce bugs, if the dictionary implementation will change.

I think, you should inline incoming level and change the debug message in the else statement.