[PATCH] git-gui (Win): make starting via "Git GUI Here" on .git/ possible

This works around git-gui's error message

    Cannot use funny .git directory: .

when started from the .git/ directory, which is useful in repositories
without any directories for the right click.

Now git-gui can be started via Windows Explorer shell extension (Git GUI
Here) from the .git/ directory.

Signed-off-by: Markus Heidelberg <redacted>
---
 windows/git-gui.sh |    7 ++++++-
 1 files changed, 6 insertions(+), 1 deletions(-)

diff --git a/windows/git-gui.sh b/windows/git-gui.sh
index 53c3a94..66bbb2f 100644
--- a/windows/git-gui.sh
+++ b/windows/git-gui.sh

@@ -3,7 +3,12 @@
 exec wish "$0" -- "$@"
 
 if { $argc >=2 && [lindex $argv 0] == "--working-dir" } {
-	cd [lindex $argv 1]
+	set workdir [lindex $argv 1]
+	cd $workdir
+	if {[lindex [file split $workdir] end] eq {.git}} {
+		# Workaround for Explorer right click "Git GUI Here" on .git/
+		cd ..
+	}
 	set argv [lrange $argv 2 end]
 	incr argc -2
 }

-- 
1.6.2.1.428.g41b20c