[PATCH v2 git-gui] git-gui--askpass: Do not hang on exit

Anders Kaseorg wrote:

When git-gui--askpass is manually copied from the source into
/usr/lib/git-core, though, it doesn’t particularly work; its window
just freezes after the password is typed.

The problem seems to be the

  bind . <Destroy>    {exit $::rc}

line; apparently each exit causes the window to be destroyed again,
resulting in git gui hanging.

Reported-by: Anders Kaseorg <redacted>
Signed-off-by: Jonathan Nieder <redacted>
---
 I wrote:

 > @@ -52,7 +52,9 @@ proc finish {} {
 >  
 >  	set ::rc 0
 >  	puts $::answer
 > +	bind . <Destroy> {}
 >  	destroy .

 but that does nothing to help the case when the destroy event
 comes from the window manager.  Here’s a saner patch (sorry for
 the noise).

diff --git a/git-gui--askpass b/git-gui--askpass
index 12e117e..20b8799 100755
--- a/git-gui--askpass
+++ b/git-gui--askpass

@@ -39,7 +39,10 @@ pack .b -side bottom -fill x -padx 10 -pady 10
 bind . <Visibility> {focus -force .e}
 bind . <Key-Return> finish
 bind . <Key-Escape> {destroy .}
-bind . <Destroy>    {exit $rc}
+bind . <Destroy>    {
+	bind . <Destroy> {}
+	exit $::rc
+}
 
 proc finish {} {
 	if {$::yesno} {

--