[easytag] Fix error build

[Yosef Or Boczko <yoseforb src gnome org>]

commit 6fa3e3ff722a650c66ed7ceafd59229e1f07e110
Author: Yosef Or Boczko <yoseforb src gnome org>
Date:   Tue Mar 10 17:25:26 2015 +0200

    Fix error build
    
    src/file_list.c:243:15: error: ‘LC_CTYPE’ undeclared (first use in this
    function)

 src/file_list.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/file_list.c b/src/file_list.c
index 9f4f6ac..950479e 100644
--- a/src/file_list.c
+++ b/src/file_list.c
@@ -22,6 +22,7 @@
 
 #include <gtk/gtk.h>
 #include <glib/gi18n.h>
+#include <locale.h>
 #include <string.h>
 #include <stdlib.h>
 #include <sys/stat.h>