Made missing limbs not process.
Moved code in processing so that ORGAN_DESTROYED limbs won't process wounds and chemicals. They still need to process once to actually fall off (too lazy to change that)
Made dropping limbs remove all wounds and germs. Instead, one big wound is spawned on parent organ. Damage depends on the organ.
Removed missing  limbs bleeding on their own, since that's what that wound is for now.
They still would ache until surgically mended anyway.
Fixed possible issue with amputation not fixing the rotten limb.