[v3] correct line number

[Benjamin Kosnik]

Fixes this fail from the last check in:

FAIL: 19_diagnostics/error_category/cons/copy_neg.cc

tested x86/linux

-benjamin
-------------- next part --------------
A non-text attachment was scrubbed...
Name: p.20070907-1
Type: application/octet-stream
Size: 730 bytes
Desc: not available
URL: <http://gcc.gnu.org/pipermail/libstdc++/attachments/20070907/cdda2d24/attachment.obj>