Power estimates never shown when 250 or more parameters

[RX14]

Given that MAX_PARAM is 750, and power estimates are only shown when past_results.size() > 3 * all_parameters.parameters.size(), it's possible to enter a situation where power estimates are never shown.

For me, a large number of bridge interfaces (network interfaces have 6 parameters per) had increased the number of parameters past 250. I removed them from the saved_results file using sed and it fixed the situation. However, most modern laptops have a large number of USB and PCI devices which may make this situation more common. This bug should probably be fixed.