OTHER: Store xmmsv list size as signed integer.
OTHER: Store xmmsv list size as signed integer.

As position is specified as signed (because we support negative
indices counting from list end) size can't use the full range of a
unsigned anyway. Making size signed makes us avoid casts when
comparing with the signed position.

six600110/xmms2,xmms2/xmms2-stable,chrippa/xmms2,xmms2/xmms2-stable,mantaraya36/xmms2-mantaraya36,theeternalsw0rd/xmms2,mantaraya36/xmms2-mantaraya36,oneman/xmms2-oneman-old,chrippa/xmms2,dreamerc/xmms2,mantaraya36/xmms2-mantaraya36,six600110/xmms2,xmms2/xmms2-stable,krad-radio/xmms2-krad,theeternalsw0rd/xmms2,krad-radio/xmms2-krad,oneman/xmms2-oneman,xmms2/xmms2-stable,theeternalsw0rd/xmms2,dreamerc/xmms2,chrippa/xmms2,theefer/xmms2,krad-radio/xmms2-krad,oneman/xmms2-oneman-old,dreamerc/xmms2,theefer/xmms2,krad-radio/xmms2-krad,six600110/xmms2,chrippa/xmms2,chrippa/xmms2,mantaraya36/xmms2-mantaraya36,theeternalsw0rd/xmms2,oneman/xmms2-oneman-old,xmms2/xmms2-stable,theeternalsw0rd/xmms2,theefer/xmms2,oneman/xmms2-oneman,six600110/xmms2,theeternalsw0rd/xmms2,chrippa/xmms2,oneman/xmms2-oneman,mantaraya36/xmms2-mantaraya36,theefer/xmms2,oneman/xmms2-oneman,dreamerc/xmms2,oneman/xmms2-oneman,oneman/xmms2-oneman,theefer/xmms2,krad-radio/xmms2-krad,dreamerc/xmms2,oneman/xmms2-oneman,mantaraya36/xmms2-mantaraya36,theefer/xmms2,krad-radio/xmms2-krad,xmms2/xmms2-stable,mantaraya36/xmms2-mantaraya36,oneman/xmms2-oneman-old,oneman/xmms2-oneman-old,theefer/xmms2,six600110/xmms2,six600110/xmms2