(#3043) Handle data with no positions in dataset processing

[squaregoldfish]

Fix #3043

[codecov]

Codecov Report

Attention: Patch coverage is 16.66667% with 15 lines in your changes missing coverage. Please review.

Project coverage is 29.90%. Comparing base (3cf4f63) to head (c3be013).
Report is 1 commits behind head on master.

Files with missing lines	Patch %	Lines
...xeter/QuinCe/data/Dataset/DatasetSensorValues.java	0.00%	9 Missing ⚠️
...ata/Dataset/DefaultMeasurementValueCalculator.java	0.00%	5 Missing ⚠️
...data/Dataset/DefaultMeasurementValueCollector.java	75.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #3044      +/-   ##
============================================
- Coverage     29.90%   29.90%   -0.01%     
  Complexity     2113     2113              
============================================
  Files           394      394              
  Lines         20492    20503      +11     
  Branches       2780     2787       +7     
============================================
+ Hits           6129     6131       +2     
- Misses        13898    13906       +8     
- Partials        465      466       +1     

Flag	Coverage Δ
unittests	29.90% <16.66%> (-0.01%)	⬇️

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