New Score Wizard crashes if "Done" is pressed when "Choose Instruments" is selected.
Steps to reproduce:
Open the new score wizard.
At this point, "Choose Instruments" should be selected.
Result: The program crashes.
The crash can be prevented by adding this line at the beginning of NewWizardTemplatePage::templateChanged():
setFinalPage(QFileInfo(s).completeBaseName() != "00-Blank");
This has the effect of disabling the "Done" button if "Choose Instruments" is selected, which is exactly what we want to do, since in this case the next step is for the user to choose the desired instruments.