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If it's unsupported or invalid, then there's no point trying to rebuild it using a value that may have been derived from the same layout to begin with. Move the checks before the attempts at copying the layout while at it. Fixes ticket #9908. Signed-off-by: James Almer <jamrial@gmail.com> Fixes: out of array acces Fixes: poc5 Fixes: poc6 Reported-by: VulDB CNA Team Found-by: CookedMelon Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>