pollHandler not handling output pins properly

[Alan Noble]

There are 2 issues in the processing of output pins:

• pins that lack an actuator are incorrectly treated as an error, rather than being ignored.
• boolean variables are not converted to corresponding integer values, i.e. “true” to 1.

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[Alan Noble]

Implemented in https://bitbucket.org/ausocean/vidgrind/commits/a9af2a8fc9c0337d704aada501f86514403effd9

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