Tk 8.5.7, which is the latest version on Centos 6, does not support
getting the current theme with [ttk::style theme use]. Use the existing
workaround for this in all places.

Signed-off-by: Clemens Buchacher <dri...@gmx.net>
---
 git-gui/lib/themed.tcl | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/git-gui/lib/themed.tcl b/git-gui/lib/themed.tcl
index 351a712..88b3119 100644
--- a/git-gui/lib/themed.tcl
+++ b/git-gui/lib/themed.tcl
@@ -1,6 +1,14 @@
 # Functions for supporting the use of themed Tk widgets in git-gui.
 # Copyright (C) 2009 Pat Thoyts <pattho...@users.sourceforge.net>
 
+proc ttk_get_current_theme {} {
+       # Handle either current Tk or older versions of 8.5
+       if {[catch {set theme [ttk::style theme use]}]} {
+               set theme  $::ttk::currentTheme
+       }
+       return $theme
+}
+
 proc InitTheme {} {
        # Create a color label style (bg can be overridden by widget option)
        ttk::style layout Color.TLabel {
@@ -28,10 +36,7 @@ proc InitTheme {} {
                }
        }
 
-       # Handle either current Tk or older versions of 8.5
-       if {[catch {set theme [ttk::style theme use]}]} {
-               set theme  $::ttk::currentTheme
-       }
+       set theme [ttk_get_current_theme]
 
        if {[lsearch -exact {default alt classic clam} $theme] != -1} {
                # Simple override of standard ttk::entry to change the field
@@ -248,7 +253,7 @@ proc tspinbox {w args} {
 proc ttext {w args} {
        global use_ttk
        if {$use_ttk} {
-               switch -- [ttk::style theme use] {
+               switch -- [ttk_get_current_theme] {
                        "vista" - "xpnative" {
                                lappend args -highlightthickness 0 -borderwidth 0
                        }
-- 
2.7.4

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