update realm migration for FilterCondition

app/src/main/java/net/pokeranalytics/android/model/migrations/PokerAnalyticsMigration.kt

@@ -65,7 +65,7 @@ class PokerAnalyticsMigration : RealmMigration {
                 it.addField("intValue", Integer::class.java)
                 it.addRealmListField("intValues", Integer::class.java)
                 it.addField("doubleValue", Double::class.java).setNullable("doubleValue", true)
-                it.addRealmListField("doubleValues", Double::class.java).setNullable("doubleValue", true)
+                it.addRealmListField("doubleValues", Double::class.java)
                 it.addField("stringValue", String::class.java)
             }