[kaffe] compiling for m68k with optimization works.

[Kiyo Inaba]

Hi all,
I've checked what makes -O for m68k-linux broken and finally found
the code (sorry, not the 'reason') which makes it. The patch is
attached in the tail of this mail, but in short it is made by
one assertion deleted in kaffe/kaffevm/support.c. I guess this
deletion may cause some (un-expected) optimization on m68k-linux
and breaks entire system.