fixed 6759354d from https://gitee.com/hongjin-li/third_party_NuttX/pulls/128

fix: memory leak

memory allocated by calloc is never released when error returned
Signed-off-by: NJinuineLi <lihongjin1@huawei.com>
Change-Id: I593bad4a833a225d2f91dc036a23e4fffdc6fd6d

fs/dirent/fs_opendir.c

@@ -129,6 +129,7 @@ DIR *opendir(const char *path)
     }
   if (ret < 0)
     {
+      free(dir);
       goto errout_with_count;
     }
   dir->fd_status = DIRENT_MAGIC;