Fixes #33 : pressing back when playing a hand on the replayer

app/src/main/java/net/pokeranalytics/android/ui/modules/handhistory/replayer/ReplayerFragment.kt

@@ -61,6 +61,11 @@ class ReplayerFragment : RealmFragment() {
 		inflater.inflate(R.menu.toolbar_replayer, menu)
 	}
 
+	override fun onPause() {
+		super.onPause()
+		pause() // avoid crashes due to the runnable calling a null reference
+	}
+
 	private fun initData() {
 
 		val id = arguments?.getString(BundleKey.HAND_HISTORY_ID.value) ?: throw PAIllegalStateException("Attempt to start a replayer without hh id")