[hm] Fix TemperatureAvg being wrong for RF nodes
[hm] Fix TemperatureAvg being wrong for RF nodes

Solution is to run calcTemp() even if there's been 0 accumulatedCount for the period which allows the average to update

kdakers80/HeaterMeter,shmick/HeaterMeter,kdakers80/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,dwright134/HeaterMeter,CapnBry/HeaterMeter,dwright134/HeaterMeter,CapnBry/HeaterMeter,kdakers80/HeaterMeter,kdakers80/HeaterMeter,dwright134/HeaterMeter,dwright134/HeaterMeter,dwright134/HeaterMeter,shmick/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter,shmick/HeaterMeter,kdakers80/HeaterMeter,CapnBry/HeaterMeter,kdakers80/HeaterMeter,dwright134/HeaterMeter,CapnBry/HeaterMeter,shmick/HeaterMeter,CapnBry/HeaterMeter,CapnBry/HeaterMeter