scripting: use String.length()==0 instead of String.equals(empty string)

Change-Id: Icff6a5d19aaf7ac7ebb0cd54140bd388cba0f24d
Reviewed-on: https://gerrit.libreoffice.org/11431
Reviewed-by: David Tardon <dtardon@redhat.com>
Tested-by: David Tardon <dtardon@redhat.com>

scripting/java/com/sun/star/script/framework/container/ParcelDescriptor.java

@@ -332,7 +332,7 @@ public class ParcelDescriptor {
 
         tempitem = document.createElement("description");
         String description = script.getDescription();
-        if (description == null || description.equals(""))
+        if (description == null || description.length() == 0)
         {
             description = script.getLogicalName();
         }