Merge git://repo.or.cz/git-gui

* git://repo.or.cz/git-gui:
  git-gui: Correctly cleanup msgfmt '1 message untranslated' output
  git-gui: Make the statistics of po2msg match those of msgfmt
  git-gui: Fallback to Tcl based po2msg.sh if msgfmt isn't available
  git-gui: Work around random missing scrollbar in revision list

git-gui/lib/choose_rev.tcl

@@ -451,7 +451,8 @@ method _sb_set {sb orient first last} {
 			focus $old_focus
 		}
 	}
-	$sb set $first $last
+
+	catch {$sb set $first $last}
 }
 
 method _show_tooltip {pos} {