patch, 7 partsC cleanup series, mostly nasty shadowing

This series of patches intend to fix some not very nice bits of code. None of them are critical though.

 0001-avoid-to-use-error-that-shadows-the-function-name-use-err-instead.txt
 0002-git_dir-holds-pointers-to-local-strings-hence-MUST-be-const.txt
 0003-missing-static-keywords.txt
 0004-remove-ugly-shadowing-of-loop-indexes-in-subloops.txt
 0005-missing-define-DEBUG-0-that-made-the-preprocessor-whine.txt
 0006-use-name-len-in-switch-directly-instead-of-creating-a-shadowed-variable.txt
 0007-n-is-in-fact-unused-and-is-later-shadowed.txt

 builtin-apply.c    |   10 ++++------
 builtin-grep.c     |    2 ++
 builtin-mv.c       |    6 +++---
 builtin-push.c     |   10 +++++-----
 builtin-tar-tree.c |    2 +-
 cache.h            |    2 +-
 date.c             |    5 ++---
 environment.c      |    7 ++++---
 git.c              |    6 +++---
 http-push.c        |    2 +-
 10 files changed, 26 insertions(+), 26 deletions(-)