SDL: Fix remaining -Wimplicit-fallthrough warnings

SDL Commits
1 
From d2a2787783bd0f495516529e054aa86e9bbeb8c1 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Tue, 28 Mar 2023 19:24:33 +0200
Subject: [PATCH] Fix remaining -Wimplicit-fallthrough warnings

---
 test/testautomation_audio.c | 3 +--
 test/testoverlay2.c         | 1 +
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/testautomation_audio.c b/test/testautomation_audio.c
index 97df178bca4d..bd586314f954 100644
--- a/test/testautomation_audio.c
+++ b/test/testautomation_audio.c
@@ -174,7 +174,7 @@ int audio_initOpenCloseQuitAudio()
                 desired.samples = 4096;
                 desired.callback = _audio_testCallback;
                 desired.userdata = NULL;
-
+                break;
             case 1:
                 /* Set custom desired spec */
                 desired.freq = 48000;
@@ -264,7 +264,6 @@ int audio_pauseUnpauseAudio()
                 desired.callback = _audio_testCallback;
                 desired.userdata = NULL;
                 break;
-
             case 1:
                 /* Set custom desired spec */
                 desired.freq = 48000;
diff --git a/test/testoverlay2.c b/test/testoverlay2.c
index 0f194d375d55..a5dba68633b7 100644
--- a/test/testoverlay2.c
+++ b/test/testoverlay2.c
@@ -209,6 +209,7 @@ void loop()
             if (event.key.keysym.sym != SDLK_ESCAPE) {
                 break;
             }
+            SDL_FALLTHROUGH;
         case SDL_QUIT:
             done = SDL_TRUE;
             break;