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Checking in a patch that avoids the import, thereby avoiding
the hang.  As suggested, the "linecache" import in warnings
had to be moved.

Even though I checked it in, I attach the patch here, and
have assigned it to Guido for review.  If happy, just mark
it as closed.

/cvsroot/python/python/dist/src/Python/errors.c,v  <--  errors.c
new revision: 2.76; previous revision: 2.75
/cvsroot/python/python/dist/src/Python/pythonrun.c,v  <-- 
pythonrun.c
new revision: 2.178; previous revision: 2.177
/cvsroot/python/python/dist/src/Lib/warnings.py,v  <-- 
warnings.py
new revision: 1.19; previous revision: 1.18