correct parsing of led color

src/main/java/eu/siacs/conversations/services/NotificationService.java

@@ -224,7 +224,7 @@ public class NotificationService {
     private int getLedNotificationColor(SharedPreferences preferences) {
         String ledColorString = preferences.getString("led_notification_color", "0xffffffff");
         try {
-            return Integer.valueOf(ledColorString);
+            return Long.decode(ledColorString).intValue();
         } catch (NumberFormatException e) {
             return 0xffffffff;
         }