Use strtof rather than atof for float values#2726
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`atof` produces a double value, which we immediately cast to a float in several cases. Like we already do elsewhere, e.g. in `tempradio`, use `strtof` to avoid using the double type at all. While unlikely, this should also avoid any double rounding precision isssues, as well as be a bit faster.
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atofproduces a double value, which we immediately cast to a float in several cases. Like we already do elsewhere, e.g. intempradio, usestrtofto avoid using the double type at all. While unlikely, this should also avoid any double rounding precision isssues, as well as be a bit faster.This is similar to #1104.