Fix replacement of variables in wizard parameters.

This was broken in case of no targets page being used, and using
the project name variable in default values for wizard parameters in the
page following the intro page (like it is done in the hello world
wizard).

Reviewed-by: Friedemann Kleint

src/libs/utils/wizard.cpp

@@ -337,6 +337,12 @@ WizardProgress *Wizard::wizardProgress() const
     return d->m_wizardProgress;
 }
 
+bool Wizard::validateCurrentPage()
+{
+    emit nextClicked();
+    return QWizard::validateCurrentPage();
+}
+
 void Wizard::_q_currentPageChanged(int pageId)
 {
     Q_D(Wizard);