More crash fixes

app/src/main/java/eu/kanade/tachiyomi/event/ChapterCountEvent.kt

@@ -1,3 +1,16 @@
 package eu.kanade.tachiyomi.event
 
-class ChapterCountEvent(val count: Int)
+import rx.Observable
+import rx.subjects.BehaviorSubject
+
+class ChapterCountEvent() {
+
+    private val subject = BehaviorSubject.create<Int>()
+
+    val observable: Observable<Int>
+        get() = subject
+
+    fun emit(count: Int) {
+        subject.onNext(count)
+    }
+}