[PATCH] gitk: fix for "gitk <ambiguous-name> --"

[Johannes Schindelin <Johannes.Schindelin@gmx.de>]

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If you have an ambiguous ref, i.e. a file in the working directory bears
the same name, you have to use "--" at the end to disambiguate ref from
file. This works with "git rev-list". Make it work with gitk, too.

Noticed by Uwe Kleine-König.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>
---

	Uwe, did your name come out right? I recently had to manually fix 
	pine, and realised only then what a tedious work it is to teach 
	pine about utf-8. Hopefully it worked out.

 gitk |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/gitk b/gitk
index 2d6a6ef..a248f5a 100755
--- a/gitk
+++ b/gitk
@@ -7440,7 +7440,7 @@ set cmdline_files {}
 set i [lsearch -exact $revtreeargs "--"]
 if {$i >= 0} {
     set cmdline_files [lrange $revtreeargs [expr {$i + 1}] end]
-    set revtreeargs [lrange $revtreeargs 0 [expr {$i - 1}]]
+    set revtreeargs [lrange $revtreeargs 0 $i]
 } elseif {$revtreeargs ne {}} {
     if {[catch {
 	set f [eval exec git rev-parse --no-revs --no-flags $revtreeargs]
-- 
1.5.3.rc0.2640.g59df9-dirty