BUGFIX: Fix crash when adding meters and toggling detailed CPU time.

See https://bugzilla.redhat.com/show_bug.cgi?id=987805 for details.
(thanks to Dawid Gajownik for the detailed analysis!)

SwapMeter.c

@@ -66,7 +66,6 @@ MeterClass SwapMeter_class = {
    },
    .setValues = SwapMeter_setValues, 
    .defaultMode = BAR_METERMODE,
-   .items = 1,
    .total = 100.0,
    .attributes = SwapMeter_attributes,
    .name = "Swap",