This change saves several EC routines from crashing when an EC_KEY is missing a public key. The public key is optional in the EC private key format and, without this patch, running the following through `openssl ec` causes a crash:
-----BEGIN EC PRIVATE KEY----- MBkCAQEECAECAwQFBgcIoAoGCCqGSM49AwEH -----END EC PRIVATE KEY-----
0009-ec_private_key_dont_crash.patch
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