SDL: testaudio: Fix compiler warning.

https://github.com/libsdl-org/SDL/commit/5ca3c50bf0477562b17647773e1f65307d86d3bc

From 5ca3c50bf0477562b17647773e1f65307d86d3bc Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Wed, 2 Aug 2023 15:23:37 -0400
Subject: [PATCH] testaudio: Fix compiler warning.

---
 test/testaudio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/testaudio.c b/test/testaudio.c
index ff0fb27a83fc..7087ca211173 100644
--- a/test/testaudio.c
+++ b/test/testaudio.c
@@ -547,7 +547,7 @@ static void StreamThing_ondrop(Thing *thing, int button, float x, float y)
             TrashThing(thing);
         } else if (((droppable_highlighted_thing->what == THING_LOGDEV) || (droppable_highlighted_thing->what == THING_LOGDEV_CAPTURE)) && (droppable_highlighted_thing != thing->line_connected_to)) {
             /* connect to a logical device! */
-            SDL_Log("Binding audio stream ('%s') to logical device %u", thing->titlebar, droppable_highlighted_thing->data.logdev.devid);
+            SDL_Log("Binding audio stream ('%s') to logical device %u", thing->titlebar, (unsigned int) droppable_highlighted_thing->data.logdev.devid);
             if (thing->line_connected_to) {
                 const SDL_AudioSpec *spec = &droppable_highlighted_thing->data.logdev.spec;
                 SDL_UnbindAudioStream(thing->data.stream.stream); /* unbind from current device */