Opraveno mazání záznamů z požadavků

closes #257

src/main/java/info/bukova/isspst/services/signeddocs/SignedDocumentServiceImpl.java

@@ -76,6 +76,10 @@ public class SignedDocumentServiceImpl extends AbstractOwnedService<SignedDocume
 
 	@Override
 	public void delFromApprove(SignedDocument document) {
+		if (document == null) {
+			return;
+		}
+
 		super.delete(document);
 
 		for (SignedDocumentItem item : document.getItems()) {