make items in destroyed cargo units scatter around
fix issue 5285 by processing a separate copy of the item and making sure not to access any destroyed vehicle / part
fix second part of issue 5285 by processing a separate copy of the active item on the map
Merge branch 'fix-minimap-4' of https://github.com/BevapDin/Cataclysm-DDA into BevapDin-fix-minimap-4