Fixes Pod Person Cloning
*You can create clones from replica pods now, even if they aren't in their body at time of harvest
*This fixes find_dead_player in cloning.dm, which was excluding ghosts because it demanding a brain
*Thanks to Aranclanos who basically figured everything out
*Replica pods seeds will now only accept the first valid blood sample it's given, and won't be overwriten with null values if you accidentally jab the seeds with the empty syringe afterward.
*Fixes Issue #275
Merge pull request #698 from Incoming5643/podpersonfix

Fixes Pod Person Cloning