[project @ 2004-09-10 14:53:44 by simonmar]

[project @ 2004-09-10 14:53:44 by simonmar]
Fix problem that shows up when building stage2 on Windows: slots of a
vector table that can never happen are normally filled with the
RtsShouldNeverHappen label, which currently prints as "0".  On systems
with leading underscores on labels, such as Windows, this turns into
"_0" which is reported as an undefined symbol.

Having a label print as "0" is a real hack, so the solution is to do
it properly.  This commit does just that.