Removed null pointer exception when updating OS's who all didn't have a location (and we are trying to give them a location)

Author: Maximilian

opensilex-core/src/main/java/org/opensilex/core/event/bll/MoveLogic.java

@@ -162,6 +162,9 @@ public StringUriMap<List<MoveModel>> getMovesWithLocationPerTarget(List<URI> tar
     public ListWithPagination<MoveModel> searchMovesWithLocationObservation(MoveSearchFilter filter) throws Exception {
         //Get moves
         ListWithPagination<MoveModel> moves = dao.search(filter);
+        if(CollectionUtils.isEmpty(moves.getList())){
+            return moves;
+        }
         //Get locations
         List<LocationObservationModel> correspondingLocObs =
                 getMovesCorrespondingLocationObservationModels(
@@ -741,6 +744,9 @@ private List<LocationObservationModel> getMovesCorrespondingLocationObservationM
             List<URI> modelUris,
             LocationObservationLogic locObsLogic
     ){
+        if(CollectionUtils.isEmpty(modelUris)){
+            return Collections.emptyList();
+        }
         LocationObservationSearchFilter locationObservationSearchFilter = new LocationObservationSearchFilter();
         locationObservationSearchFilter.setMoveUris(modelUris);
         locationObservationSearchFilter.setPageSize(ScientificObjectCsvImporterLogic.LOCATION_FETCHING_PAGE_SIZE);