AttributeRelation: fix for void-attributes

entity/AttributeRelation_entity/entityfields/value/valueProcess.js

@@ -6,3 +6,5 @@ var attributeType = vars.get("$field.ATTRIBUTE_TYPE");
 var contentType = AttributeTypeUtil.getContentType(attributeType);
 if (vars.get("$this.value") == null && contentType == "BOOLEAN")
     result.string("0");
+else if (!contentType)
+    result.string("");

entity/AttributeRelation_entity/recordcontainers/jdito/onDelete.js

@@ -4,7 +4,7 @@ import("Sql_lib");
 import("system.db");
 
 var rowData = vars.get("$local.rowdata");
-if (rowData["AB_ATTRIBUTE_ID.value"] && rowData["VALUE.value"])
+if (rowData["AB_ATTRIBUTE_ID.value"])
 {
     newWhere("AB_ATTRIBUTERELATION.AB_ATTRIBUTERELATIONID", vars.get("$local.uid"))
         .deleteData(true, "AB_ATTRIBUTERELATION")