cx_built_in_test: debounce audible warning for nil #146
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We recently had a case where either rpm or servo out returned nil for a single loop for reasons that don't seem to be related to a telemetry dropout. To narrow down the cause, we have split the nil checks in two separate warnings. To prevent unnecessary concern, we are reducing the severity of the warning until one of these returns nil three loops in a row (or if 3+ ESCs do this all at once).
Also fixed an issue where continuous nil returns would result in message spam.
SW-219