[539083] fixed clear force

Bug: https://bugs.eclipse.org/bugs/show_bug.cgi?id=539083
Signed-off-by: Alois Zoitl <alois.zoitl@gmx.at>
diff --git a/plugins/org.eclipse.fordiac.ide.monitoring/src/org/eclipse/fordiac/ide/monitoring/handlers/ClearForceHandler.java b/plugins/org.eclipse.fordiac.ide.monitoring/src/org/eclipse/fordiac/ide/monitoring/handlers/ClearForceHandler.java
index 45efc3a..6643543 100644
--- a/plugins/org.eclipse.fordiac.ide.monitoring/src/org/eclipse/fordiac/ide/monitoring/handlers/ClearForceHandler.java
+++ b/plugins/org.eclipse.fordiac.ide.monitoring/src/org/eclipse/fordiac/ide/monitoring/handlers/ClearForceHandler.java
@@ -26,7 +26,7 @@
 	public Object execute(ExecutionEvent event) throws ExecutionException {
 		super.execute(event);
 		StructuredSelection selection = (StructuredSelection)HandlerUtil.getCurrentSelection(event);
-		VarDeclaration var = ForceHandler.getVariable(selection);				
+		VarDeclaration var = ForceHandler.getVariable(selection.getFirstElement());				
 		if(null != var){		
 			MonitoringManager manager = MonitoringManager.getInstance();
 			MonitoringBaseElement element = manager.getMonitoringElement(var);