Fix for issue #12

do not try to fetch premise if "premiseId" list is empty

src/main/java/de/avatic/lcc/repositories/premise/PremiseRepository.java

@@ -124,6 +124,8 @@ public class PremiseRepository {
     @Transactional(readOnly = true)
     public List<Premise> getPremisesById(List<Integer> premiseIds) {
 
+        if(premiseIds.isEmpty())
+            return Collections.emptyList();
 
         String placeholders = String.join(",", Collections.nCopies(premiseIds.size(), "?"));
         String query = """