Mulebot and vehicle updates - they now run over mobs! (#7430)

* Mulebot and vehicle updates - they now run over mobs!

* Remove unneeded safety check, and lying check

* Fix Mulebots running over themselves, fix runtime with blood.dm

code/modules/organs/blood.dm

@@ -354,7 +354,7 @@ proc/blood_splatter(var/target,var/datum/reagent/blood/source,var/large)
 		drop.drips |= drips
 
 	// If there's no data to copy, call it quits here.
-	if(!source)
+	if(!istype(source))
 		return B
 
 	// Update appearance.