[PATCH] git-gui: check whether systems nice command works or disable it

This fixes issue 394 from msysgit. It seems that the Gnuwin32 project
provides a nice command but it returns a "not implemented" error. To
help users we now try to execute once and disable it in case it fails.

Signed-off-by: Heiko Voigt <redacted>
---

see: http://code.google.com/p/msysgit/issues/detail?id=394
for more information.

cheers Heiko

 git-gui/git-gui.sh |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/git-gui/git-gui.sh b/git-gui/git-gui.sh
index 1fb3cbf..eec2dc9 100755
--- a/git-gui/git-gui.sh
+++ b/git-gui/git-gui.sh

@@ -388,6 +388,9 @@ proc _lappend_nice {cmd_var} {
 
 	if {![info exists _nice]} {
 		set _nice [_which nice]
+		if {[catch {exec $_nice git version}]} {
+			set _nice {}
+		}
 	}
 	if {$_nice ne {}} {
 		lappend cmd $_nice

-- 
1.7.0.rc1.7.gc0da5