vector _IterCategory undeclared

[Benjamin Kosnik]

> I would submit that the libstdc++ testsuite is woefully inadequate.  Because I
> have additional patches similar to the first in the works and have been burnt
> once, I'm feverishly trying to generate additional testcases that should catch
> (indeed, have already caught) problems.  Trouble is, I'm spending more time
> devising testcases than in actually doing the patch, perhaps as it should be,
> but I still don't think I can guarantee complete coverage. 

Nor do you need to guarantee of complete coverage. What is needed, is 
something that breaks. 

Now y'all know why I prefer patches with testsuite entries. I got sick of 
harassing people for this.

-benjamin