[gnome-calculator] Added Serbian Dinar with fixed rate (fixes #49)

[Robert Roth <robertroth src gnome org>]

commit 2523a74dc2992cd6493489cea0f5219a5f20c6eb
Author: Robert Roth <robert roth off gmail com>
Date:   Mon Nov 2 23:29:57 2020 +0200

    Added Serbian Dinar with fixed rate (fixes #49)

 lib/currency.vala | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/lib/currency.vala b/lib/currency.vala
index 1c538a4f..e366522c 100644
--- a/lib/currency.vala
+++ b/lib/currency.vala
@@ -77,6 +77,7 @@ public class CurrencyManager : Object
         default_currency_manager.currencies.append (new Currency ("RON", _("New Romanian Leu"), "L"));
         default_currency_manager.currencies.append (new Currency ("RUB", _("Russian Rouble"), "руб."));
         default_currency_manager.currencies.append (new Currency ("SAR", _("Saudi Riyal"), "س.ر"));
+        default_currency_manager.currencies.append (new Currency ("RSD", _("Serbian Dinar"), "дин"));
         default_currency_manager.currencies.append (new Currency ("SEK", _("Swedish Krona"), "kr"));
         default_currency_manager.currencies.append (new Currency ("SGD", _("Singapore Dollar"), "$"));
         default_currency_manager.currencies.append (new Currency ("THB", _("Thai Baht"), "฿"));
@@ -340,6 +341,7 @@ public class CurrencyManager : Object
 
         /* Set some fixed rates */
         set_ecb_fixed_rate ("BDT", "0.0099", eur_rate);
+        set_ecb_fixed_rate ("RSD", "0.0085", eur_rate);
         set_ecb_fixed_rate ("EEK", "0.06391", eur_rate);
         set_ecb_fixed_rate ("CFA", "0.00152449", eur_rate);