fix: access null pointer in src/net #1453
Merged
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在原来的代码中,第153行的对pfe是否为空指针的判断应当提前,因为在第108行中的if判断中已经使用了指针pfe。
为防止空指针引用,应将第153行的空指针判断放在整个if判断的最前面