In order for 'make depend' to be able to handle both Qt4/5 and Qt3,
they need to operate on different object file names.
renames qt*.o to qt3*.o for Qt3
renames qt*.cpp to qt3*.cpp for Qt3 (not essential but seems worthwhile)
moves Qt3's headers from include/qt*.h to win/Qt3/qt3*.h
copies include/qt_xpms.h (before rename) or win/Qt3/qt3_xpms.h (after)
to win/Qt/qt_xpms.h so that Qt4/5 no longer shares one header file
modifies win/Qt3/*.cpp and win/Qt3/qt3_win.h to reflect new header names
modifies Makefile.src to have Qt3 'moc' commands use new names
updates Makefile.src via re-running 'make depend'
'make depend' was only looking at include/*.h to find nested inclusion.
Now it will also look at win/*/*.h. That found a bunch of missing
dependencies for the old gnome sources and a few for Qt3.
Building without Qt still works. Building with it (any version) has
not been tested.
2fe31eec46