Avoids gratuitous semicolon if REP_ERR_FILE is empty.

During the first run of 'uncrustify', there were a few files which the uncrustify
tool couldn't handle, mainly due to weird macro-magic effects.  Those files where
left as-is, with lots of weird formatting und tabs.  This patch now uncrustifies
them, too, by neutralizing the macro-magic with some manual intervention.

Transform forgotten folders dev/ps and dom/lgm/ngin2d.
Minor clean-ups.

Adjust all includes outside of ui/.

Add flags in Makefile.am to make all compile.

There were code paths within CreateLine where the method did return a value,
and others where it didn't.  No caller of CreateLine actually considered
the return values at all.  Hence we may as well decide to not return anything
at all.  This should fix an issue reported by the undefined-behavior sanitizer.

Thanks to Carsten Gräser for pointing this out.

To get rid of tabs, mainly.  These two files were left out when moving
to git, because uncrustify wouldn't take them.  With a bit a manual
arm-twisting uncrustify now processes these files.

The (very) old DDD debugger with the (very) old motif gui cannot handle umlauts.

Compilers are much smarter than programmers, and know best when to use
CPU registers.  Leave the decision to them and do not clutter the code
with the 'register' keyword.