handle empty line at end of file

core/src/main/groovy/com/muwire/core/files/PersisterService.groovy

@@ -36,6 +36,8 @@ class PersisterService {
 			def slurper = new JsonSlurper()
 			try {
 				location.eachLine {
+					if (it.trim().length() == 0)
+						return
 					def parsed = slurper.parseText it
 					def event = fromJson parsed
 					if (event != null)

core/src/test/groovy/com/muwire/core/files/PersisterServiceLoadingTest.groovy

@@ -151,7 +151,7 @@ class PersisterServiceLoadingTest {
 		json2 = JsonOutput.toJson(json2)
 		
 		persisted.append "$json1\n"
-		persisted.append json2
+		persisted.append "$json2\n"
 		
 		PersisterService ps = new PersisterService(persisted, eventBus, 100, null)
 		ps.start()