[gnome-calculator] Fixed CI build

[Robert Roth <robertroth src gnome org>]

commit a8e85c9f4070b555f9bc2acc6ab8c2b00a8e4b7d
Author: Robert Roth <robert roth off gmail com>
Date:   Tue Jan 12 11:15:42 2021 +0200

    Fixed CI build

 lib/currency.vala | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)
---
diff --git a/lib/currency.vala b/lib/currency.vala
index 0ee65563..f8af1702 100644
--- a/lib/currency.vala
+++ b/lib/currency.vala
@@ -27,7 +27,14 @@ public class CurrencyManager : Object
             return default_currency_manager;
 
         default_currency_manager = new CurrencyManager ();
-        default_currency_manager.refresh_interval = new Settings ("org.gnome.calculator").get_int 
("refresh-interval");
+        try
+        {
+            default_currency_manager.refresh_interval = new Settings ("org.gnome.calculator").get_int 
("refresh-interval");
+        }
+        catch (Error e)
+        {
+            warning ("Failed to read refresh interval from settings: %s", e.message);
+        }
         default_currency_manager.currencies.append (new Currency ("AED", _("UAE Dirham"), "إ.د"));
         default_currency_manager.currencies.append (new Currency ("AUD", _("Australian Dollar"), "$"));
         default_currency_manager.currencies.append (new Currency ("BDT", _("Bangladeshi Taka"), "৳"));