Coverity Fixes

Coverity Fixes

x_algor.c: Explicit null dereferenced
cms_sd.c: Resource leak
ts_rsp_sign.c Resource Leak
extensions_srvr.c: Resourse Leak
v3_alt.c: Resourse Leak
pcy_data.c: Resource Leak
cms_lib.c: Resource Leak
drbg_lib.c: Unchecked return code

Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Shane Lontis <shane.lontis@oracle.com>
(Merged from https://github.com/openssl/openssl/pull/12531)