mavlink/mavlink — pull request #158 by mpaperno (2013-12-26 18:27:52+00:00)
Title: Match mavlink_system_t.nav_mode size to allowed size in heartbeat msg (32bits).

Heartbeat message uses 32 bits for "custom_mode" which is aka "nav_mode."
A bitfield for use for autopilot-specific flags.

Thanks,
-Max