[perl #37845] [TODO] (or BUG?) src/revision.c deps

# New Ticket Created by Leopold Toetsch
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- I've e.g. a fully uptodate and built r10349.
- svn up to r10350
- I see a change in makefiles/root.in
- perl Configure.pl && make -s

Now I get:
src/revision.c:18:2: #error revision PARROT_REVISION != configure
revision 10350
make: *** [src/revision.o] Error 1

- ok, I try:

$ rm src/revision.c ; make

Same error.

Another 'make clean' needed. Another quarter of an hour for nothing.

* What is this #error good for?
* Why?

Shit (sorry) ... minutes later ...

'make clean' doesn't do it. 'make realclean' is needed for that cruft.

Fixes very welcome,
leo