Add missing include to avoid implicit function declaration, prohibited with
GCC 14.

diff --git a/src/tracee/tracee.c b/src/tracee/tracee.c
index 9b16f6aa..39308c32 100644
--- a/src/tracee/tracee.c
+++ b/src/tracee/tracee.c
@@ -44,6 +44,7 @@
 #include "cli/note.h"
 
 #include "compat.h"
+#include "mem.h"
 
 #ifndef __W_STOPCODE
 #define __W_STOPCODE(sig)	((sig) <<8 | 0x7f)