[Bug c/44513] improve column number and text of format warnings

[nicola at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44513

Nicola Pero <nicola at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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      Known to work|                            |4.6.0
   Target Milestone|---                         |4.6.0