Unitary system div by zero in controlCoolingSystemToSP

[mjwitte]

Issue overview

When testing the defect file for #10782 with a debug build, there's a divide by zero here, during KickOffSimulation:

https://github.com/NREL/EnergyPlus/blob/ec7398adcfbd2ba6bc71e72b57e3febb6cd99708/src/EnergyPlus/UnitarySystem.cc#L13824

Details

Some additional details for this issue (if relevant):

• Version of EnergyPlus 25.1.0-b46af9c5e3

Checklist

Add to this list or remove from it as applicable. This is a simple templated set of guidelines.

• Defect file added see AirLoopHVAC:DedicatedOutdoorAirSystem Sizing Mixing up Mass and Volume Flow Rates, no reporting #10782
• Ticket added to EnergyPlus Defect Complexity (Github Project)
• Pull request created (the pull request will have additional tasks related to reviewing changes that fix this defect)