Using #ifdef to work both on Qt4 and Qt5

[hosseinn]

This one should work both on Qt4 and Qt5. Please review.

[alium]

Errors:

1. single_inst/qtsingleapplication.h:43:30: fatal error: QtGui/QApplication: No such file or directory
2. configdialog.h:4:25: fatal error: QtGui/QDialog: No such file or directory
3. mainwindow.h:4:29: fatal error: QtGui/QMainWindow: No such file or directory

I can compile qt4 version, but qt5 version give me this errors above - see: https://stackoverflow.com/questions/8995399/error-qapplication-no-such-file-or-directory and/or https://stackoverflow.com/questions/14260475/qdialog-not-such-file-or-directory-qt-windows

[hosseinn]

Which Qt version do you use? Run this to have a clean make environment:
(You should make sure that you have Qt5 variables set correctly.)

qmake znotes.pro
make distclean
qmake znotes.pro
make

[alium]

@ hosseinn:
I'm very sorry, my mistake, I was wrong edited PKGBUILD, and until now I noticed. Works fine!