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Peter Hutterer authored
We don't have a sensible use case where we want hex to double, or INF to double, or any of that. So check the strings for invalid characters and bail out early. Invalid characters include 'e' and whitespaces too, we don't need those. Small chance of things breaking: if the user-exposed calibration matrix property was specified using hex numbers this will stop working now. I'll take that risk. Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
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