[gimp] Offset tool: mark forgotten messages for translation

[Alexandre Prokoudine <aprokoudine src gnome org>]

commit 47d2b685a6579f95419b4794fb108fd1ce8dc594
Author: Alexandre Prokoudine <alexandre prokoudine gmail com>
Date:   Wed Jun 12 22:44:33 2019 +0300

    Offset tool: mark forgotten messages for translation

 app/tools/gimpoffsettool.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/tools/gimpoffsettool.c b/app/tools/gimpoffsettool.c
index c6a9de8523..d2b53c5937 100644
--- a/app/tools/gimpoffsettool.c
+++ b/app/tools/gimpoffsettool.c
@@ -509,7 +509,7 @@ gimp_offset_tool_dialog (GimpFilterTool *filter_tool)
   gtk_box_pack_start (GTK_BOX (vbox), hbox, FALSE, FALSE, 0);
   gtk_widget_show (hbox);
 
-  button = gtk_button_new_with_mnemonic ("By _width/2");
+  button = gtk_button_new_with_mnemonic (_("By _width/2"));
   gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
   gtk_widget_show (button);
 
@@ -517,7 +517,7 @@ gimp_offset_tool_dialog (GimpFilterTool *filter_tool)
                     G_CALLBACK (gimp_offset_tool_half_x_clicked),
                     offset_tool);
 
-  button = gtk_button_new_with_mnemonic ("By _height/2");
+  button = gtk_button_new_with_mnemonic (_("By _height/2"));
   gtk_box_pack_start (GTK_BOX (hbox), button, TRUE, TRUE, 0);
   gtk_widget_show (button);