[easytag] Add another const

[David King <davidk src gnome org>]

commit 833926b3d37e75292ea92c79f92f62fa68ea954f
Author: David King <amigadave amigadave com>
Date:   Wed Dec 14 08:57:54 2016 +0000

    Add another const

 src/tag_area.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/tag_area.c b/src/tag_area.c
index 039aa26..c786ca2 100644
--- a/src/tag_area.c
+++ b/src/tag_area.c
@@ -2920,7 +2920,7 @@ et_tag_area_display_et_file (EtTagArea *self,
                              const ET_File *ETFile)
 {
     EtTagAreaPrivate *priv;
-    File_Tag *FileTag = NULL;
+    const File_Tag *FileTag;
 
     g_return_val_if_fail (ET_TAG_AREA (self), FALSE);