do not write null sha1s to on-disk index

diff --git a/git-gui/macosx/AppMain.tcl b/git-gui/macosx/AppMain.tcl
index 41ca08e2b7929c59806b3b07a18dbae0ebfae933..ddbe6334a258dae46b6c333d53590f3b920a9cab 100644 (file)
--- a/git-gui/macosx/AppMain.tcl
+++ b/git-gui/macosx/AppMain.tcl
@@ -7,7 +7,7 @@ if {[string first -psn [lindex $argv 0]] == 0} {
 }
 
 if {[file tail [lindex $argv 0]] eq {gitk}} {
-       set argv0 [file join $gitexecdir gitk]
+       set argv0 [lindex $argv 0]
        set AppMain_source $argv0
 } else {
        set argv0 [file join $gitexecdir [file tail [lindex $argv 0]]]