Very minor changes in semantics due to previous differences: * negative positions are not supported any more (clamped to >= 0) * setting muted to the same value previously set to the control itself won't signal any more. Change-Id: Iacf4310508d853ae82b63dee28095fce12b6ff28 Reviewed-by: Dmytro Poplavskiy <dmytro.poplavskiy@nokia.com>