SDL: artsaudio: revert bad arts_init return code check from commit ce5da5d.

SDL Commits
1 
From 6fc17b0e2b421c6f8b996b28f76447ea0956c08e Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 10 Oct 2023 10:40:00 +0300
Subject: [PATCH] artsaudio: revert bad arts_init return code check from commit
 ce5da5d.

---
 src/audio/arts/SDL_artsaudio.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/audio/arts/SDL_artsaudio.c b/src/audio/arts/SDL_artsaudio.c
index ea4f3119b53a..f3aa94b1504e 100644
--- a/src/audio/arts/SDL_artsaudio.c
+++ b/src/audio/arts/SDL_artsaudio.c
@@ -300,12 +300,12 @@ static void ARTS_Deinitialize(void)
 }
 
 
-static SDL_bool ARTS_Init(SDL_AudioDriverImpl * impl)
+static SDL_bool ARTS_Init(SDL_AudioDriverImpl *impl)
 {
     if (LoadARTSLibrary() < 0) {
         return SDL_FALSE;
     } else {
-        if (SDL_NAME(arts_init) () != NULL) {
+        if (SDL_NAME(arts_init) () != 0) {
             UnloadARTSLibrary();
             SDL_SetError("ARTS: arts_init failed (no audio server?)");
             return SDL_FALSE;