[PATCH 00/14] -Wshadow warning fixes

[Adam Jackson]

These all fix shadowed declarations, where you have a variable in inner scope
with the same name as another variable in outer scope.  There are still a few
left, because apparently gcc thinks it's cool to warn you when a variable name
shadows a typedef name, and I think that's a compiler bug I don't want to work
around in code.  I also didn't attempt to fix up any of the tests.

Series is atop Keith's warning-fixes branch, if it happens to matter.

- ajax