this logs critical messages while disarmed if we have logged any
messages while armed. This fixes issue #7010 where log files show the
incorrect mode if the log includes any portions where the user
disarmed. It makes analysing users logs very difficult. It also
affects parameters, so we don't always know the true parameter values
in logs from users.
RC_Channel: To nullptr from NULL.
AC_Fence: To nullptr from NULL.
AC_Avoidance: To nullptr from NULL.
AC_PrecLand: To nullptr from NULL.
DataFlash: To nullptr from NULL.
SITL: To nullptr from NULL.
GCS_MAVLink: To nullptr from NULL.
DataFlash: To nullptr from NULL.
AP_Compass: To nullptr from NULL.
Global: To nullptr from NULL.
Global: To nullptr from NULL.
WriteBlockCheckStartupMessages returned true if finished writing out
all startup messages. However, that may have allowed the caller to
then write out their message - but the timestamp on that message would
almost certainly be lower than the messages we've just written out.