[gimp] plug-ins: leave a message for translators.

[Jehan Pagès <jehanp src gnome org>]

commit 733b2344b3e4dcf3f8ef834f280b4c82aa77c565
Author: Jehan <jehan girinstud io>
Date:   Sat Dec 9 23:10:51 2017 +0100

    plug-ins: leave a message for translators.
    
    "Digital Elevation Model" (DEM) is a technical term which therefore
    cannot be translated just by its meaning.

 plug-ins/common/file-raw-data.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/plug-ins/common/file-raw-data.c b/plug-ins/common/file-raw-data.c
index 5e7e7be..c1c48cf 100644
--- a/plug-ins/common/file-raw-data.c
+++ b/plug-ins/common/file-raw-data.c
@@ -1724,6 +1724,10 @@ load_dialog (const gchar *filename,
 
   if (is_hgt)
     {
+      /* Translators: Digital Elevation Model (DEM) is a technical term
+       * used for 3D surface modeling or relief map; so it must be
+       * translated by the proper technical term in your language.
+       */
       frame = gimp_frame_new (_("Digital Elevation Model data"));
     }
   else