Bug in threshold data type conversion

For all tested precip indices climix crashes, see below. Probably the threshold should be casted as np.float32 already when read into climix?

climix -s -e -x cdd    /home/sm_lbarr/PROJ/test_climix/indata/CLIMPACT2_TEST/precip_AUS_climpact2-sampledata_gridded-obs_v1_ET-SCI_v1_1991-2010.nc
INFO:root:Loading metadata
INFO:root:Scheduler ready; starting main program.
INFO:root:Preparing indices
INFO:root:Found implementation for index_function <spell_length> from distribution <climix 0.9.0+14.g29e95e2>
INFO:root:Starting calculations for index <climix.index.Index object at 0x2ab6840234a8>
INFO:root:Building output filename
INFO:root:Preparing input data
INFO:root:Calculating index
INFO:root:Adding coord categorisation.
INFO:root:Extracting period cube
INFO:root:Preparing cube
INFO:root:Calculation took 3.6670 seconds.
Traceback (most recent call last):
  File "/home/sm_lbarr/.conda/envs/climix-devel-3/bin/climix", line 11, in <module>
    load_entry_point('climix', 'console_scripts', 'climix')()
  File "/home/sm_lbarr/CODE/climix/climix/main.py", line 126, in main
    args.output_template, args.sliced_mode)
  File "/home/sm_lbarr/CODE/climix/climix/main.py", line 105, in do_main
    result = index(input_data)
  File "/home/sm_lbarr/CODE/climix/climix/index.py", line 23, in __call__
    self.index_function.prepare(sub_cube)
  File "/home/sm_lbarr/CODE/climix/climix/index_functions.py", line 200, in prepare
    input_cube.standard_name)
  File "/home/sm_lbarr/CODE/climix/climix/util/__init__.py", line 9, in change_units
    change_pr_units(cube_or_coord, new_units, new_standard_name)
  File "/home/sm_lbarr/CODE/climix/climix/util/change_pr_units.py", line 118, in change_pr_units
    cube_or_coord.points *= float(conv_factor)
numpy.core._exceptions.UFuncTypeError: Cannot cast ufunc 'multiply' output from dtype('float64') to dtype('int64') with casting rule 'same_kind'