[gnome-builder] ide-build-system: fix possible use of uninitialized self

[Sébastien Lafargue <slafargue src gnome org>]

commit 9ad218eb7fd39456025601ff8149035921dd9191
Author: Sebastien Lafargue <slafargue gnome org>
Date:   Mon Nov 7 13:46:50 2016 +0100

    ide-build-system: fix possible use of uninitialized self

 libide/buildsystem/ide-build-manager.c |    9 ++++++---
 1 files changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/libide/buildsystem/ide-build-manager.c b/libide/buildsystem/ide-build-manager.c
index a71ca27..3b25287 100644
--- a/libide/buildsystem/ide-build-manager.c
+++ b/libide/buildsystem/ide-build-manager.c
@@ -570,7 +570,7 @@ ide_build_manager_build_save_all_cb (GObject      *object,
   g_autoptr(IdeBuildResult) build_result = NULL;
   g_autoptr(GError) error = NULL;
   g_autoptr(GTask) task = user_data;
-  IdeBuildManager *self;
+  IdeBuildManager *self = NULL;
   GCancellable *cancellable;
   BuildState *state;
 
@@ -606,8 +606,11 @@ ide_build_manager_build_save_all_cb (GObject      *object,
   ide_build_manager_set_build_result (self, build_result);
 
 failure:
-  self->saving = FALSE;
-  g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
+  if (self != NULL)
+    {
+      self->saving = FALSE;
+      g_object_notify_by_pspec (G_OBJECT (self), properties [PROP_BUSY]);
+    }
 
   IDE_EXIT;
 }