Merge branch 'maint' of git://repo.or.cz/git-gui into maint

* 'maint' of git://repo.or.cz/git-gui:
  git-gui: Focus insertion point at end of strings in repository chooser
  git-gui: Avoid hardcoded Windows paths in Cygwin package files
  git-gui: Default TCL_PATH to same location as TCLTK_PATH
  git-gui: Paper bag fix error dialogs opening over the main window
  git-gui: Ensure error dialogs always appear over all other windows
  git-gui: relax "dirty" version detection
  git-gui: support Git Gui.app under OS X 10.5

git-gui/lib/error.tcl

@@ -1,6 +1,14 @@
 # git-gui branch (create/delete) support
 # Copyright (C) 2006, 2007 Shawn Pearce
 
+proc _error_parent {} {
+	set p [grab current .]
+	if {$p eq {}} {
+		return .
+	}
+	return $p
+}
+
 proc error_popup {msg} {
 	set title [appname]
 	if {[reponame] ne {}} {
@@ -11,8 +19,8 @@ proc error_popup {msg} {
 		-type ok \
 		-title [append "$title: " [mc "error"]] \
 		-message $msg]
-	if {[winfo ismapped .]} {
-		lappend cmd -parent .
+	if {[winfo ismapped [_error_parent]]} {
+		lappend cmd -parent [_error_parent]
 	}
 	eval $cmd
 }
@@ -27,13 +35,13 @@ proc warn_popup {msg} {
 		-type ok \
 		-title [append "$title: " [mc "warning"]] \
 		-message $msg]
-	if {[winfo ismapped .]} {
-		lappend cmd -parent .
+	if {[winfo ismapped [_error_parent]]} {
+		lappend cmd -parent [_error_parent]
 	}
 	eval $cmd
 }
 
-proc info_popup {msg {parent .}} {
+proc info_popup {msg} {
 	set title [appname]
 	if {[reponame] ne {}} {
 		append title " ([reponame])"
@@ -56,8 +64,8 @@ proc ask_popup {msg} {
 		-type yesno \
 		-title $title \
 		-message $msg]
-	if {[winfo ismapped .]} {
-		lappend cmd -parent .
+	if {[winfo ismapped [_error_parent]]} {
+		lappend cmd -parent [_error_parent]
 	}
 	eval $cmd
 }