get_pwd_cwd(): Do not trust st_dev/st_ino blindly
10c4c881 (Allow add_path() to add non-existent directories to the path, 2008-07-21) introduced get_pwd_cwd() function in order to favor $PWD when getenv("PWD") and getcwd() refer to the same directory but are different strings (e.g. the former gives a nicer looking name via a symbolic link to an uglier looking automounted path). The function tried to determine if two directories are the same by running stat(2) on both and comparing ino/dev fields. Unfortunately, stat() does not fill any ino or dev fields in msysgit. But there is a telltale: both ino and dev are 0 when they are not filled correctly, so let's be extra cautious. This happens to fix a bug in "get-receive-pack working_directory/" when the GIT_DIR would not be set correctly due to absolute_path(".") returning the wrong value. Signed-off-by: NJohannes Schindelin <johannes.schindelin@gmx.de> Acked-by: NJohannes Sixt <j6t@kdbg.org> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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