[glib: 4/6] tests: Fix a scan-build warning about uninitialised threads

[Sebastian Dröge <sdroege src gnome org>]

commit 6c0bde8aa4c0b4471d117d50f2afca1db5836f1f
Author: Philip Withnall <pwithnall endlessos org>
Date:   Tue Jun 7 11:09:39 2022 +0100

    tests: Fix a scan-build warning about uninitialised threads
    
    It seems that scan-build assumes `n_threads > 0`, but doesn’t assume a
    tighter condition than that, and hence assumes that the two loops to
    initialise and join the threads have different numbers of iterations.
    
    That’s obviously not the case.
    
    Try and help scan-build out here by marking `n_threads` as `const`. I
    don’t know if this will work, but it’s correct regardless.
    
    Signed-off-by: Philip Withnall <pwithnall endlessos org>

 glib/tests/mutex.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/glib/tests/mutex.c b/glib/tests/mutex.c
index a5ba2ea95c..120229e42d 100644
--- a/glib/tests/mutex.c
+++ b/glib/tests/mutex.c
@@ -186,7 +186,7 @@ addition_thread (gpointer value)
 static void
 test_mutex_perf (gconstpointer data)
 {
-  guint n_threads = GPOINTER_TO_UINT (data);
+  const guint n_threads = GPOINTER_TO_UINT (data);
   GThread *threads[THREADS];
   gint64 start_time;
   gdouble rate;