gnucash maint: Properly detect git in case of linked worktree

[Geert Janssens]

Updated	 via  https://github.com/Gnucash/gnucash/commit/a64e40da (commit)
	from  https://github.com/Gnucash/gnucash/commit/ee217c61 (commit)



commit a64e40dac33bdf1ca2a6d8f280724f08ad2b48ae
Author: Geert Janssens <geert at kobaltwit.be>
Date:   Sun Feb 18 19:53:29 2018 +0100

    Properly detect git in case of linked worktree



Summary of changes:
 util/gnc-vcs-info | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)