[PATCH 0/2] Fix warnings on access of a remote with Windows paths

This small series fixes these warnings on Windows:

C:\Temp\gittest>git fetch C:\Temp\gittest
warning: unable to access '.git/remotes/C:\Temp\gittest': Invalid argument
warning: unable to access '.git/branches/C:\Temp\gittest': Invalid argument
From C:\Temp\gittest
 * branch            HEAD       -> FETCH_HEAD

The fix is in the second patch; the first patch is a preparation that allows to write the fix in my preferred style.

Johannes Sixt (2):
  mingw.h: permit arguments with side effects for is_dir_sep
  Windows: do not treat a path with backslashes as a remote's nick name

 compat/mingw.h | 6 +++++-
 remote.c       | 5 ++++-
 2 files changed, 9 insertions(+), 2 deletions(-)