Add exception for missing filter element type

app/src/main/java/net/pokeranalytics/android/exceptions/Exceptions.kt

@@ -17,6 +17,7 @@ sealed class PokerAnalyticsException(message: String) : Exception(message) {
     object QueryTypeUnhandled: PokerAnalyticsException(message = "filter type not handled")
     object QueryValueMapUnexpectedValue: PokerAnalyticsException(message = "valueMap null not expected")
     object FilterElementExpectedValueMissing : PokerAnalyticsException(message = "filter is empty or null")
+    object FilterElementTypeMissing : PokerAnalyticsException(message = "filter element type is missing")
     data class QueryValueMapMissingKeys(val missingKeys: List<String>) : PokerAnalyticsException(message = "valueMap does not contain $missingKeys")
     data class UnknownQueryTypeForRow(val filterElementRow: FilterElementRow) : PokerAnalyticsException(message = "no filter type for $filterElementRow")
 }