fixed error on edm:object property

src/main/scala/ch/memobase/rico2edm/edm/EDM.scala

@@ -249,14 +249,14 @@ class EDM {
       // noch konsistenter implementieren
       //
       Try { Extractors.digitalObjectIdShort(graph)(digitalObject) } match {
-        case Success(value) =>
-          aggregation.addIsShownBy(value)
+        case Success(digiObjIdShort) =>
+          aggregation.addIsShownBy(digiObjIdShort)
           Extractors.ricoType(record) match {
-            case Some(value) =>
-              if (value == "Foto") {
-                aggregation.addEDMObjectFoto(Option(value))
+            case Some(ricoType) =>
+              if (ricoType == "Foto") {
+                aggregation.addEDMObjectFoto(digiObjIdShort)
               }else {
-                aggregation.addEDMObjectNoFoto(Option(value))
+                aggregation.addEDMObjectNoFoto(digiObjIdShort)
               }
             case None =>