[Interest] C'tor member initialisation with 'this'

[Jan Kundrát]

The C++'s order of destruction is, in this case:

1) ~QtSoapHttpTransport(), which does more or less nothing. By the time it 
returns, the object is no longer a QSHT (which is the reason why you must 
not call virtual methods from destructors).

2) Any member variables are destroyed. In this case, one if them is a QNAM 
which derives from QObject, so at some point the ~QObject() of the QNAM 
runs, and at that time the QNAM is removed from the list of children of its 
parent QObject, which is the former QSHT. This is safe, because 
QSHT::~QObject has not run yet, so the former QSHT is still an QObject.

3) QSHT::~QObject runs, finally. It checks the list of its children, but 
that list does not include the already destroyed QNAM, so the former QNAM 
is not deleted twice and everything is OK.

Yup, took me some time to understand this as well -- thanks for ab 
excellent question.

Cheers,
Jan

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