nochowderforyou/clams — pull request #92 by dooglus (2014-12-09 17:30:57+00:00)
Title: Fix a crash when attempting to sign a raw transaction with a zero privkey

These commands were crashing clamd:

clamd signrawtransaction "$raw" '[]' '["5TY1TqhFLax7w7Hoa6YtrejzoAuWTf5Tf1RKSvVED9tadmUMYjX"]'
clamd signrawtransaction "$raw" '[]' '["Lg7s3TveHSrHbpmAZ5Vmt9an6nim2f4gekrLRR5bJeEfT2fXkRoT"]'

That's 0 encoded as a privkey (compressed and not). It's not a valid key, and so should be rejected.