Backport #9671: backport r45271

• Status: Closed
• Assignee: naruse (Yui NARUSE)

[zzak (zzak _)]

[zzak (zzak _)]

cc #9592

[nagachika (Tomoyuki Chikanaga)]

• Status changed from Assigned to Closed
• % Done changed from 0 to 100

Applied in changeset r45778.

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merge revision(s) r45271: [Backport #9592] [Backport #9671]

* ext/openssl/ossl.c (ossl_make_error): check NULL for unknown
  error reasons with old OpenSSL, and insert a colon iff formatted
  message is not empty.