[patch] to have a working pro file

[Håvard Wall]

> +QT_SOURCE_TREE=$$fromfile($$(QTDIR)/.qmake.cache,QT_SOURCE_TREE)
> +include($$QT_SOURCE_TREE/src/qbase.pri)

I'm not sure why you need this, but QTDIR doesn't need to be defined any 
longer (since Qt 4.0), and .qmake.cache is not available after Qt has been 
installed (neither is src/qbase.pri), so I guess this will do nothing for 
most people?

--
hw