Fix lua class Index#314
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bug: 如果 super 中不存在的值为设置为 NoExist ,而 child 有这个值的话,child 也只能取到 nil 值。
修改: 在 super 检查中,忽略 NotExist.
测试例子:
创建一个蓝图类 BP_A,然后又增加了一个 BP_A 的子类蓝图 BP_A_Child, 并在 BP_A_Child 中加入了一个 Cube Component
然后在 Lua 中,BP_A 有 BP_A_C, BP_A_Child_C 继承 lua class BP_A_C。
任何时候, 如果 BP_A_C 中尝试去检查
self.Cube就会将 mt 设置为 NoExist。 之后 BP_A_Child_C 虽然有 self.Cube, 但因为 Super 已经把 Cube 设置为 NoExist, 他将永远取不到 self.Cube 了。