Char* <-> QString implicit conversion

[kingfinn]

The function declaration:

QList<QStringList> select(QString& from, QString& where, QStringList* what=0);

QList<QStringList> select(QString& from, QString& where, QStringList* what=0);

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How I call it:

QList<QStringList> dirs = svh->select("dirs", QString().setNum(dir->getId()));

QList<QStringList> dirs = svh->select("dirs", QString().setNum(dir->getId()));

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The Error I get:

/home/finn/client_gallery/dirparser.cpp:24: error: no matching function for call to ‘SqlViaHttp::select(const char [5], QString&)’

/home/finn/client_gallery/dirparser.cpp:24: error: no matching function for call to ‘SqlViaHttp::select(const char [5], QString&)’

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//EDIT:
Ahh, ok, I know so the solution.
I have to use QString instead of QString& in the Declaration.
Why is that?