fixes #236, crash after enabling discarded alternative

* when importing a plan links from values to scales have been established only for enabled alternatives. But alternatives can be discarded when they are (partially) evaluated. therefore the links for all values have to be established.

planning-core/src/main/java/eu/scape_project/planning/xml/PlanParser.java

@@ -274,9 +274,11 @@ public List<Plan> importProjects(final InputStream in) throws PlatoException {
                 String projectName = plan.getPlanProperties().getName();
                 if ((projectName != null) && (!"".equals(projectName))) {
                     /*
-                     * establish links from values to scales
+                     * establish links from values to scales. For all(!)
+                     * alternatives: An alternative could have be discarded
+                     * after some measurements have already been added.
                      */
-                    plan.getTree().initValues(plan.getAlternativesDefinition().getConsideredAlternatives(),
+                    plan.getTree().initValues(plan.getAlternativesDefinition().getAlternatives(),
                         plan.getSampleRecordsDefinition().getRecords().size(), true);
                     /*
                      * establish references of Experiment.uploads
@@ -520,7 +522,7 @@ private static void addRules(Digester digester) throws ParserConfigurationExcept
         digester.addSetNext("*/experiment", "setExperiment");
         digester.addCallMethod("*/experiment/description", "setDescription", 0);
         digester.addCallMethod("*/experiment/settings", "setSettings", 0);
-        PlanParser.addCreateUpload(digester, "*/experiment/workflow", "setWorkflow", DigitalObject.class);        
+        PlanParser.addCreateUpload(digester, "*/experiment/workflow", "setWorkflow", DigitalObject.class);
 
         PlanParser.addCreateUpload(digester, "*/experiment/results/result", null, DigitalObject.class);
         PlanParser.addCreateUpload(digester, "*/result/xcdlDescription", "setXcdlDescription", XcdlDescription.class);