[gnome-builder] todo: ignore .m4 files

[Christian Hergert <chergert src gnome org>]

commit 1f83dab5ade9d7ce7858df995ece87493a05c53e
Author: Christian Hergert <chergert redhat com>
Date:   Wed May 11 13:24:16 2016 +0300

    todo: ignore .m4 files
    
    I don't think anyone will be too annoyed by this, unless they are writing
    autoconf-archive or something.

 plugins/todo/todo_plugin/__init__.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/plugins/todo/todo_plugin/__init__.py b/plugins/todo/todo_plugin/__init__.py
index 11904af..d292b75 100644
--- a/plugins/todo/todo_plugin/__init__.py
+++ b/plugins/todo/todo_plugin/__init__.py
@@ -87,7 +87,8 @@ class TodoWorkbenchAddin(GObject.Object, Ide.WorkbenchAddin):
         vcs = context.get_vcs()
 
         for item in items:
-            if vcs.is_ignored(item.props.file):
+            file = item.props.file
+            if vcs.is_ignored(file) or file.get_basename().endswith('.m4'):
                 continue
             self.panel.add_item(item, prepend=prepend)