[BUG] 6.1.3 breaks AudioProcessLoadMeasurer

Hi,

AFAICT this particular commit breaks juce::AudioProcessLoadMeasurer's RAII ScopedTimer constructor.

Before this patch a call to:

juce::AudioProcessLoadMeasurer::ScopedTimer timer {loadMeter_};

was enough to get load measure; now I need to pass it the extra numSamples information, otherwise the measured load is NaN all the time. I guess if it’s now required, the former one-argument constructor should be revoked.

This issue is fixed on develop:

Nice, thanks!