[gnome-builder] autotools: add additional type check

[Christian Hergert <chergert src gnome org>]

commit 1322e0914f2292e23914bb722af3eb4c113c74bf
Author: Christian Hergert <christian hergert me>
Date:   Mon Sep 14 20:06:03 2015 -0700

    autotools: add additional type check

 plugins/autotools/ide-makecache.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/autotools/ide-makecache.c b/plugins/autotools/ide-makecache.c
index 259e486..623ed71 100644
--- a/plugins/autotools/ide-makecache.c
+++ b/plugins/autotools/ide-makecache.c
@@ -865,6 +865,7 @@ ide_makecache_get_file_flags_worker (GTask        *task,
   IDE_ENTRY;
 
   g_assert (EGG_IS_TASK_CACHE (source_object));
+  g_assert (!cancellable || G_IS_CANCELLABLE (cancellable));
   g_assert (G_IS_TASK (task));
   g_assert (lookup != NULL);
   g_assert (lookup->relative_path != NULL);