Remove data creation at each launch

app/src/main/java/net/pokeranalytics/android/ui/activity/HomeActivity.kt

@@ -66,16 +66,16 @@ class HomeActivity : PokerAnalyticsActivity() {
 	private fun createDefaultSessions() {
 
 		val realm = Realm.getDefaultInstance()
-		realm.sessionDao().deleteAllSessions()
-
-		val data = ArrayList<Session>()
-
-		for (i in 0..100) {
-			val session = Session()
-			session.creationDate = Date()
-			data.add(session)
+		if (realm.where(Session::class.java).findAll().isEmpty()) {
+			realm.sessionDao().deleteAllSessions()
+			val data = ArrayList<Session>()
+			for (i in 0..100) {
+				val session = Session()
+				session.creationDate = Date()
+				data.add(session)
+			}
+			realm.sessionDao().createOrUpdateSessions(data)
 		}
-		realm.sessionDao().createOrUpdateSessions(data)
 		realm.close()
 
 	}