bugfix: tools: blob_handler: properly handle smallest reply
bugfix: tools: blob_handler: properly handle smallest reply

The smallest reply doesn't include a CRC.

Change-Id: I3c2004b494f7a851d94805d56eb4e7d2c627083e
Signed-off-by: Patrick Venture <36c53fa43f47f3fd67cb2fc38031827244d18a1f@google.com>

openbmc/phosphor-ipmi-flash