Merge pull request #1031 from benjchristensen/subject-npe

Fix NPE in SubjectSubscriptionManager

rxjava-core/src/main/java/rx/subjects/SubjectSubscriptionManager.java

@@ -94,7 +94,7 @@ public void call() {
                         }));
                         if (subscription.isUnsubscribed()) {
                             addedObserver = false;
-                            break;
+                            return;
                         }
                         // on subscribe add it to the map of outbound observers to notify
                         newState = current.addObserver(subscription, observer);