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As suggested by Kees[1], replace the old-style 0-element array members of multiple structs in ebtables.h with modern C99 flexible array. [1]: https://lore.kernel.org/all/5E8E0F9C-EE3F-4B0D-B827-DC47397E2A4A@kernel.org/ [ fw@strlen.de: keep struct ebt_entry_target as-is, causes compiler warning: "variable sized type 'struct ebt_entry_target' not at the end of a struct or class is a GNU extension" ] Link: https://github.com/KSPP/linux/issues/21 Signed-off-by: GONG, Ruiqi <gongruiqi1@huawei.com> Reviewed-by: Kees Cook <keescook@chromium.org> Signed-off-by: Florian Westphal <fw@strlen.de>