[gnome-builder] style: always assign NULL to g_autoptr

[Christian Hergert <chergert src gnome org>]

commit 1de9bedc374d1dad54e0cbd37b0b66c1678e592d
Author: Christian Hergert <chergert redhat com>
Date:   Sun Dec 17 16:57:00 2017 -0800

    style: always assign NULL to g_autoptr

 src/plugins/flatpak/gbp-flatpak-sources.c          |    8 +++++---
 src/plugins/project-tree/gb-project-tree-actions.c |    2 +-
 2 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/src/plugins/flatpak/gbp-flatpak-sources.c b/src/plugins/flatpak/gbp-flatpak-sources.c
index 5233c73..1792134 100644
--- a/src/plugins/flatpak/gbp-flatpak-sources.c
+++ b/src/plugins/flatpak/gbp-flatpak-sources.c
@@ -434,14 +434,16 @@ get_soup_session (void)
 }
 
 static GBytes *
-download_uri (SoupURI *uri,
-              GError **error)
+download_uri (SoupURI  *uri,
+              GError  **error)
 {
-  g_autoptr(SoupSession) session;
+  g_autoptr(SoupSession) session = NULL;
   g_autoptr(SoupRequest) req = NULL;
   g_autoptr(GInputStream) input = NULL;
   g_autoptr(GOutputStream) out = NULL;
 
+  g_assert (uri != NULL);
+
   session = get_soup_session ();
 
   req = soup_session_request_uri (session, uri, error);
diff --git a/src/plugins/project-tree/gb-project-tree-actions.c 
b/src/plugins/project-tree/gb-project-tree-actions.c
index f9a4945..fc2b5ea 100644
--- a/src/plugins/project-tree/gb-project-tree-actions.c
+++ b/src/plugins/project-tree/gb-project-tree-actions.c
@@ -310,7 +310,7 @@ gb_project_tree_actions_open_in_terminal (GSimpleAction *action,
 
   if (!gb_project_file_get_is_directory (GB_PROJECT_FILE (item)))
     {
-      g_autoptr(GFile) parent;
+      g_autoptr(GFile) parent = NULL;
 
       parent = g_file_get_parent (file);
       workdir = g_file_get_path (parent);