SDL: ps2audio: Patched to compile.

https://github.com/libsdl-org/SDL/commit/d7cf63db67b9bb61d73e0130a4da5ec5d7cb2e1a

From d7cf63db67b9bb61d73e0130a4da5ec5d7cb2e1a Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Sat, 22 Jul 2023 11:45:11 -0400
Subject: [PATCH] ps2audio: Patched to compile.

---
 src/audio/ps2/SDL_ps2audio.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/audio/ps2/SDL_ps2audio.c b/src/audio/ps2/SDL_ps2audio.c
index 22d841d47f26..0f16344b7332 100644
--- a/src/audio/ps2/SDL_ps2audio.c
+++ b/src/audio/ps2/SDL_ps2audio.c
@@ -61,7 +61,7 @@ static int PS2AUDIO_OpenDevice(SDL_AudioDevice *device)
     device->hidden->channel = audsrv_set_format(&format);
     audsrv_set_volume(MAX_VOLUME);
 
-    if (_this->hidden->channel < 0) {
+    if (device->hidden->channel < 0) {
         return SDL_SetError("Couldn't reserve hardware channel");
     }
 
@@ -110,9 +110,9 @@ static void PS2AUDIO_CloseDevice(SDL_AudioDevice *device)
             device->hidden->channel = -1;
         }
 
-        if (_this->hidden->rawbuf != NULL) {
-            SDL_aligned_free(_this->hidden->rawbuf);
-            _this->hidden->rawbuf = NULL;
+        if (device->hidden->rawbuf != NULL) {
+            SDL_aligned_free(device->hidden->rawbuf);
+            device->hidden->rawbuf =2 NULL;
         }
         SDL_free(device->hidden);
         device->hidden = NULL;