fix crash in mcl_mobs

mods/ENTITIES/mcl_mobs/api.lua

@@ -2958,7 +2958,7 @@ local function check_item_pickup(self)
 	end
 end
 
-local function damage_mob(self,reason,damage)
+local function damage_mob(self,reason,damage,pos)
 	if not self.health then return end
 	damage = floor(damage)
 	if damage > 0 then
@@ -2989,7 +2989,7 @@ local function check_entity_cramming(self)
 			elseif l.cram == nil and not self.child then
 				table.insert(ncram,l)
 			elseif l.cram then
-				damage_mob(l,"cramming",CRAMMING_DAMAGE)
+				damage_mob(l,"cramming",CRAMMING_DAMAGE,p)
 			end
 		end
 	end
@@ -3079,7 +3079,7 @@ local falling = function(self, pos)
 				if add ~= 0 then
 					damage = damage + damage * (add/100)
 				end
-				damage_mob(self,"fall",damage)
+				damage_mob(self,"fall",damage,pos)
 			end
 
 			self.old_y = self.object:get_pos().y