фикс калькулятора объемов

src/main/java/com/documentation/volume/service/strategyVolume/CalculationPracticeVolume.java

@@ -52,9 +52,9 @@ public class CalculationPracticeVolume implements CalculationVolumeStrategy {
             volumePracticeDTO.setNumberSubgroups(contingent.getNumberSubgroups());
             volumePracticeDTO.setNumberLectureStreams(contingent.getNumberLectureStreams());
 
-            volumePracticeDTO.setContingentContract(contingent.getContingentContract());
-            volumePracticeDTO.setContingentBudget(contingent.getContingentBudget());
-            volumePracticeDTO.setContingentForeign(contingent.getContingentForeign());
+            volumePracticeDTO.setContingentContract(contingent.getContingentContract() != null ? contingent.getContingentContract() : 0);
+            volumePracticeDTO.setContingentBudget(contingent.getContingentBudget() != null ? contingent.getContingentBudget() : 0);
+            volumePracticeDTO.setContingentForeign(contingent.getContingentForeign() != null ? contingent.getContingentForeign() : 0);
             volumePracticeDTO.setCourse(practice.getCourse());
             volumePracticeDTO.setSemester(practice.getSemester());
             volumePracticeDTO.setDisciplineHours(practice.getDisciplineHours());