if we have only deterministic evaluation in generations do not set score to zero

dream/plugins/Batches/BatchesStochasticACO.py

@@ -210,6 +210,8 @@ class BatchesStochasticACO(BatchesACO):
             self.outputSheet.write(self.rowIndex,3,-ant['score'])
             self.rowIndex+=1
         
+        # if we had stochastic evaluation of ants at the end of the generation
+        if numberOfAntsForStochasticEvaluationInGeneration:
             # for the ants that were not evaluated stochastically set score = 0
             for ant in antsInCurrentGeneration:
                 if ant['evaluationType']=='deterministic':