umbrello/umldoc.cpp : In function loadFromXMI, after doing the actual load do...

umbrello/umldoc.cpp : In function loadFromXMI, after doing the actual load do not call UMLApp::app()->setGenerator() if UMLApp::app()->generator() returns null. Reason: In this case the UML primitive types are used, and calling setGenerator destroys all datatypes loaded from a foreign file (seen on loading PapyrusUML file)