Merge pull request #105 from Unity-Technologies/categorical-parameter-enumeration-fix

Categorical parameter enumeration fix

com.unity.perception/CHANGELOG.md

 
 Fixed Unity Simulation nodes generating one extra empty image before generating their share of the randomization scenario iterations
 
+Fixed enumeration in the CategoricalParameter.categories property
+
 ## [0.5.0-preview.1] - 2020-10-14
 
 ### Known Issues

com.unity.perception/Runtime/Randomization/Parameters/CategoricalParameter.cs

             get
             {
                 var catOptions = new List<(T, float)>(m_Categories.Count);
-                for (var i = 0; i < catOptions.Count; i++)
+                for (var i = 0; i < m_Categories.Count; i++)
                     catOptions.Add((m_Categories[i], probabilities[i]));
                 return catOptions;
             }