Handy code snippet #378

Babar was just asking on Stickam how you'd set a particular inventory item to be first of your inventory window (not rearranging inv item order, but just scrolling the window to the correct point). And here we are:

function settop(this InvWindow *, InventoryItem *thing)
{
  int itemi=0;
  while (itemi < this.TopItem) {
    if (this.ItemAtIndex[itemi]==thing) {
      this.TopItem=itemi;
      return;
    }
    itemi++;
  }
}