`XComGameState_WorldRegion.CanBeStartingRegion` calls event with wrong region

[copyrite]

https://discord.com/channels/165245941664710656/273238884433788928/1433919428017524859

The current iteration of XComGameState_WorldRegion.CanBeStartingRegion reads

function bool CanBeStartingRegion(XComGameState StartState)
{
    local XComGameState_WorldRegion RegionState;
    local int idx, Count;

    // Variable for issue #1303
    local bool bEligible;

    Count = 0;

    for(idx = 0; idx < LinkedRegions.Length; idx++)
    {
        RegionState = XComGameState_WorldRegion(StartState.GetGameStateForObjectID(LinkedRegions[idx].ObjectID));
        if(RegionState != none &&
            !class'XComGameState_RegionLink'.static.TriggerOverrideAllowStartingRegionLink(StartState, self, RegionState) /* Issue #774 */)
        {
            return false;
        }
        else
        {
            Count++;
        }
    }

    // Start Issue #1303
    bEligible = (Count > 1);

    return class'XComGameState_RegionLink'.static.TriggerOverrideEligibleStartingRegion(RegionState, bEligible);
    // End Issue #1303
}

We should be returning whether the object calling the method (self) can be a starting region. Instead, we're triggering the event with RegionState, which is a leftover from the for-loop, one of self.LinkedRegions. The effect is that any setups where this event is being fired is flagging wrong regions eligible for starting.

Fix is simple, replace the return line with

    return class'XComGameState_RegionLink'.static.TriggerOverrideEligibleStartingRegion(self, bEligible);