Fixed minor messup with the pipeline registration

modules/cppcourse/cppcourse.cpp

@@ -7,7 +7,7 @@
 namespace campvis {
 
     // explicitly instantiate templates to register the pipelines to make them available in the prototyping GUI
-    //template class PipelineRegistrar<CPPCoursePipeline>;
+    template class PipelineRegistrar<CPPCoursePipeline>;
 
     template class SmartProcessorRegistrar<VerySimpleRaycaster>;
 }