Fixed that DialogData's message number gets increased even though getBalance() message could not get created (e. g. if retrieving balance is not supported by account)

fints4javaLib/src/main/kotlin/net/dankito/fints/FinTsClient.kt

@@ -224,11 +224,13 @@ open class FinTsClient @JvmOverloads constructor(
             balanceResponse.getFirstSegmentById<BalanceSegment>(InstituteSegmentId.Balance)?.let {
                 balance = it.balance
             }
+
+            if (balanceResponse.didReceiveResponse) {
+                dialogData.increaseMessageNumber()
+            }
         }
 
 
-        dialogData.increaseMessageNumber()
-
         val message = messageBuilder.createGetTransactionsMessage(parameter, bank, customer, product, dialogData)
 
         val response = getAndHandleResponseForMessageThatMayRequiresTan(message, bank, customer, dialogData)