NullPointerError in TradeOutMessagesInterceptor

[ayust]

It appears that in some cases in Legion, MessageParser.parse is returning null but that's still getting passed to the interceptor to try to do something with. Full error below:

2019-06-29 18:34:34.376 [Thread-3] ERROR ErrorHandler - java.lang.NullPointerException
	at com.mercury.platform.core.utils.interceptor.TradeOutMessagesInterceptor$EngOutLocalizationMatcher.getDescriptor(TradeOutMessagesInterceptor.java:90)
	at com.mercury.platform.core.utils.interceptor.TradeOutMessagesInterceptor$LocalizationMatcher.processMessage(TradeOutMessagesInterceptor.java:66)
	at com.mercury.platform.core.utils.interceptor.TradeOutMessagesInterceptor.process(TradeOutMessagesInterceptor.java:39)
	at com.mercury.platform.core.utils.interceptor.MessageInterceptor.match(MessageInterceptor.java:17)
	at com.mercury.platform.core.utils.MessageFileHandler.lambda$null$2(MessageFileHandler.java:86)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
	at com.mercury.platform.core.utils.MessageFileHandler.lambda$parse$3(MessageFileHandler.java:85)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1540)
	at com.mercury.platform.core.utils.MessageFileHandler.parse(MessageFileHandler.java:84)
	at com.mercury.platform.core.utils.FileMonitor$1.onFileChange(FileMonitor.java:43)
	at org.apache.commons.io.monitor.FileAlterationObserver.doMatch(FileAlterationObserver.java:410)
	at org.apache.commons.io.monitor.FileAlterationObserver.checkAndNotify(FileAlterationObserver.java:333)
	at org.apache.commons.io.monitor.FileAlterationObserver.checkAndNotify(FileAlterationObserver.java:303)
	at org.apache.commons.io.monitor.FileAlterationMonitor.run(FileAlterationMonitor.java:182)
	at java.base/java.lang.Thread.run(Thread.java:835)