commit 6130c8260cce49846feafc490f84e9ccf299ac15
Author: Nicolas Morey <nmorey@suse.com>
Date:   Thu Sep 5 14:58:20 2024 +0200

    Add return value to non void function

diff --git testing/mt/mt_common.c testing/mt/mt_common.c
index ff92d9ef8100..bda59c3aab73 100644
--- testing/mt/mt_common.c
+++ testing/mt/mt_common.c
@@ -310,6 +310,7 @@ void* _mt_common_proxy_thread(void *id_ptr)
 {
   test_thr_data_t *tdata = (test_thr_data_t*)id_ptr;
   tdata->fptr(tdata->tid);
+  return NULL;
 }
 
 void mt_common_exec(mt_common_thrptr_t *workers)