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Coverity reports a spurious potential null pointer dereference in cms_decrypt(), since the null pointer check takes place after the pointer has already been dereferenced. The pointer can never be null, since it is initialised to point to cipher_null at the point that the containing structure is allocated. Remove the redundant null pointer check, and for symmetry ensure that the digest and public-key algorithm pointers are similarly initialised at the point of allocation. Signed-off-by: Michael Brown <mcb30@ipxe.org>