[block] bug fix: fails to handle base record
[block] bug fix: fails to handle base record

Just make a warning for now rather than fatal error
only causes a problem during initial load of old blocks
newer block do not allow this record so will be ok

Signed-off-by: Christopher Hall <97c3bc3fef1a71b149f1095f758464e4b18eb35b@bitmark.com>

bitmark-inc/bitmarkd,bitmark-inc/bitmarkd