change MFF version to Release Version of this fix

mods/mobs/api.lua

@@ -961,7 +961,10 @@ end
 
 				local s = self.object:getpos()
 				local p = self.attack.player:getpos()
-				if not s or not p then return end
+				if not p then
+					self.state = "stand"
+					return
+				end
 				p.y = p.y - .5
 				s.y = s.y + .5
 				local dist = ((p.x - s.x) ^ 2 + (p.y - s.y) ^ 2 + (p.z - s.z) ^ 2) ^ 0.5