fix issue with currency

app/src/main/java/net/pokeranalytics/android/ui/fragment/CurrenciesFragment.kt

@@ -46,6 +46,14 @@ class CurrenciesFragment : PokerAnalyticsFragment(), StaticRowRepresentableDataS
 
         private val availableCurrencies = this.systemCurrencies.filter {
             !mostUsedCurrencyCodes.contains(it.currencyCode)
+        }.filter {
+            Locale.getAvailableLocales().filter {locale ->
+                try {
+                    Currency.getInstance(locale).currencyCode == it.currencyCode
+                } catch (e: Exception) {
+                    false
+                }
+            }.isNotEmpty()
         }.sortedBy {
             it.displayName
         }.map {

app/src/main/java/net/pokeranalytics/android/util/Preferences.kt

@@ -57,7 +57,7 @@ class Preferences {
                     } catch (e: Exception) {
                         false
                     }
-                }.first().let {
+                }.firstOrNull()?.let {
                     return it
                 }
             }
@@ -90,11 +90,11 @@ class UserDefaults private constructor(context: Context) {
 
     companion object : SingletonHolder<UserDefaults, Context>(::UserDefaults) {
         lateinit var currency : Currency
-        lateinit var currencyLocale : Locale
+        var currencyLocale : Locale? = null
 
         fun setCurrencyValues(context: Context) {
             currency = Preferences.getDefaultCurrency(context) ?: getLocaleCurrency()
-            currencyLocale = Preferences.getCurrencyLocale(context) ?: Locale.getDefault()
+            currencyLocale = Preferences.getCurrencyLocale(context)
         }
 
         /**

app/src/main/java/net/pokeranalytics/android/util/extensions/NumbersExtension.kt

@@ -24,7 +24,7 @@ fun Double.formatted(): String {
 
 fun Double.toCurrency(currency: Currency? = null): String {
 
-    val currencyFormatter = NumberFormat.getCurrencyInstance(UserDefaults.currencyLocale)
+    val currencyFormatter = UserDefaults.currencyLocale?.let { NumberFormat.getCurrencyInstance(it) } ?: run { NumberFormat.getCurrencyInstance() }
 	currency?.let {
 		currencyFormatter.currency = currency
 	}