[gimp] plug-ins: "Export as DDS" is translatable.

[Jehan <jehanp src gnome org>]

commit d1de204dbc63a046dcdf8bc53964dc0cc861a5c8
Author: Jehan <jehan girinstud io>
Date:   Wed Jan 2 20:39:50 2019 +0100

    plug-ins: "Export as DDS" is translatable.
    
    Thanks to Piotr Drąg for raising my overlooking this.

 plug-ins/file-dds/ddswrite.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plug-ins/file-dds/ddswrite.c b/plug-ins/file-dds/ddswrite.c
index 59109c0de9..b5a297c7e5 100644
--- a/plug-ins/file-dds/ddswrite.c
+++ b/plug-ins/file-dds/ddswrite.c
@@ -1794,7 +1794,7 @@ static gint save_dialog(gint32 image_id, gint32 drawable_id)
 
    basetype = gimp_image_base_type(image_id);
 
-   dlg = gimp_dialog_new ("Export as DDS", "dds", NULL, GTK_WIN_POS_MOUSE,
+   dlg = gimp_dialog_new (_("Export as DDS"), "dds", NULL, GTK_WIN_POS_MOUSE,
                           gimp_standard_help_func, SAVE_PROC,
                          _("Cancel"), GTK_RESPONSE_CANCEL,
                          _("OK"),     GTK_RESPONSE_OK,