Fix missing malloc return value checks

Fix missing malloc return value checks

During work on a larger change in master a number of locations were
identified where return value checks were missing. This backports the
relevant fixes.

Reviewed-by: Richard Levitte <levitte@openssl.org>
(cherry picked from commit 903738ac63e60c10552741e2d6de9753c67e0ff3)

Conflicts:
	crypto/cms/cms_sd.c