ID30A1 MXPressA: totalOscRange can be zero

This needs a more explicit error message

http://besgui.esrf.fr/logFilePage/mxbes3-2204:38280//data/visitor/fx87/id30a1/20240917/PROCESSED_DATA/MYT1/MYT1-MYT1_270_3/run_01_MXPressA/Workflow_20240914-070259/workflow_debug_log.txt

Traceback (most recent call last):
  File "/mnt/multipath-shares/sware/exp/pxsoft/mxworkflows/id30a1/miniforge3/envs/id30a1/lib/python3.9/site-packages/ewokscore/task.py", line 401, in execute
    self.run()
  File "/mnt/multipath-shares/sware/exp/pxsoft/mxworkflows/id30a1/miniforge3/envs/id30a1/lib/python3.9/site-packages/ewokscore/ppftasks.py", line 30, in run
    result = method(**method_kwargs)
  File "/mnt/multipath-shares/sware/exp/pxsoft/mxworkflows/id30a1/bes/src/bes/actors/prepare_collect_without_strategy.py", line 320, in run
    checkForFlux and flux is not None and flux > 1.7e12 * 180.0 / totalOscRange
ZeroDivisionError: float division by zero
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
  File "/mnt/multipath-shares/sware/exp/pxsoft/mxworkflows/id30a1/miniforge3/envs/id30a1/lib/python3.9/concurrent/futures/process.py", line 246, in _process_worker
    r = call_item.fn(*call_item.args, **call_item.kwargs)
  File "/mnt/multipath-shares/sware/exp/pxsoft/mxworkflows/id30a1/miniforge3/envs/id30a1/lib/python3.9/site-packages/pypushflow/concurrent/interrupt/process.py", line 14, in task_main
    return fn(*args, **kwargs)
  File "/mnt/multipath-shares/sware/exp/pxsoft/mxworkflows/id30a1/miniforge3/envs/id30a1/lib/python3.9/site-packages/ewoksppf/ppfrunscript.py", line 27, in run
    task.execute()
  File "/mnt/multipath-shares/sware/exp/pxsoft/mxworkflows/id30a1/miniforge3/envs/id30a1/lib/python3.9/site-packages/ewokscore/task.py", line 407, in execute
    raise RuntimeError(f"Task '{self.label}' failed") from e
RuntimeError: Task 'Prepare collect without strategy' failed