换了一台服务器，个别用户wForum下无法修改个人资料。我查了一下貌似
kbs_bbs/libBBS/stuff.c里下面这段程序返回值为0了，改怎么办呢？


        if (safe_mmapfile_handle(fileno(fp), PROT_READ | PROT_WRITE, MAP_SHARED, (char **)ppum , & size) == 1) {
                fclose(fp);

                if(size < sizeof(struct usermemo) ){
                        return 0;
                }
                return (int)size;
        }
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FROM 211.151.89.*