[gtksourceview] Define ENABLE_NLS if NLS is enabled in configure

[Sébastien Wilmet <swilmet src gnome org>]

commit bf9bde4601bcd28ea92434277d949fe6ee8e8e70
Author: David King <amigadave amigadave com>
Date:   Wed Aug 28 17:13:48 2013 +0100

    Define ENABLE_NLS if NLS is enabled in configure
    
    ENABLE_NLS is not defined by intltool if NLS is enabled, so add a check
    in configure.ac and call AC_DEFINE if NLS is used.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=706846

 configure.ac |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 7cb30b3..829efdb 100644
--- a/configure.ac
+++ b/configure.ac
@@ -136,6 +136,8 @@ AS_IF([ test "$glade_catalog" = "yes" ],
 
 # i18N stuff
 IT_PROG_INTLTOOL([0.40])
+AS_IF([test "$USE_NLS" = "yes"],
+      [AC_DEFINE([ENABLE_NLS], [1], [Defined if native language support should be enabled.])])
 
 AC_SUBST([GETTEXT_PACKAGE], [gtksourceview-3.0])
 AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE], ["$GETTEXT_PACKAGE"], [Define to the gettext package name.])