[gnome-builder] beautifier: reduce warning to debug

[Christian Hergert <chergert src gnome org>]

commit 11e9f90d0b86292b43a1906c4765be887bc7b0fc
Author: Christian Hergert <chergert redhat com>
Date:   Sat Dec 16 21:22:44 2017 -0800

    beautifier: reduce warning to debug

 src/plugins/beautifier/gb-beautifier-helper.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/beautifier/gb-beautifier-helper.c b/src/plugins/beautifier/gb-beautifier-helper.c
index 8f81e36..f8cc559 100644
--- a/src/plugins/beautifier/gb-beautifier-helper.c
+++ b/src/plugins/beautifier/gb-beautifier-helper.c
@@ -150,7 +150,7 @@ gb_beautifier_helper_get_lang_id (GbBeautifierEditorAddin *self,
   buffer = GTK_TEXT_BUFFER (gtk_text_view_get_buffer (GTK_TEXT_VIEW (view)));
   if (NULL == (lang = gtk_source_buffer_get_language (GTK_SOURCE_BUFFER (buffer))))
     {
-      g_warning ("Beautifier plugin: Can't find a GtkSourceLanguage for the buffer");
+      g_debug ("Beautifier plugin: Can't find a GtkSourceLanguage for the buffer");
       return NULL;
     }