[glib] tests: Add some assertions on some otherwise-unused variables

[Philip Withnall <pwithnall src gnome org>]

commit 860dc949ca01cd452813de59b6e078d0d1f18f7c
Author: Philip Withnall <withnall endlessm com>
Date:   Fri Oct 6 12:57:06 2017 +0100

    tests: Add some assertions on some otherwise-unused variables
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=751738

 glib/tests/autoptr.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/glib/tests/autoptr.c b/glib/tests/autoptr.c
index b44cf13..754999c 100644
--- a/glib/tests/autoptr.c
+++ b/glib/tests/autoptr.c
@@ -17,6 +17,8 @@ test_autofree (void)
       g_autofree gchar *alwaysnull_again = NULL;
 
       buf[0] = 1;
+
+      g_assert_null (alwaysnull_again);
     }
 
   if (TRUE)
@@ -25,6 +27,8 @@ test_autofree (void)
 
       buf2[255] = 42;
     }
+
+  g_assert_null (alwaysnull);
 }
 
 static void
@@ -226,6 +230,7 @@ test_g_queue (void)
   g_autoptr(GQueue) val = g_queue_new ();
   g_auto(GQueue) stackval = G_QUEUE_INIT;
   g_assert (val != NULL);
+  g_assert_null (stackval.head);
 }
 
 static void