fix crash in settings when locale is badly initialized

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

@@ -70,9 +70,16 @@ class Preferences {
                 }
             }
 
-            currencyLocale = try {
-                Locale.getDefault()
+            val defaultLocale = Locale.getDefault()
+            val defaultCurrency = try {
+                Currency.getInstance(defaultLocale)
             } catch (ex: Exception) {
+                null
+            }
+
+            currencyLocale = defaultCurrency?.let {
+                defaultLocale
+            } ?: run {
                 when (Locale.getDefault().language) {
                     "en" -> Locale("en", "US")
                     "fr" -> Locale("fr", "FR")
@@ -83,6 +90,7 @@ class Preferences {
                     else -> Locale("en", "US")
                 }
             }
+
             return currencyLocale!!
         }