SDL: SDL_test: fix SDLTest_CommonQuit with NULL state

SDL Commits
1 
From 6a305e1532e46c33c153b882f7b9f237434d4870 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Fri, 13 Sep 2024 19:06:43 +0200
Subject: [PATCH] SDL_test: fix SDLTest_CommonQuit with NULL state

---
 src/test/SDL_test_common.c | 36 +++++++++++++++++++-----------------
 1 file changed, 19 insertions(+), 17 deletions(-)

diff --git a/src/test/SDL_test_common.c b/src/test/SDL_test_common.c
index 7b142e2b7afa0..6ce631cc54765 100644
--- a/src/test/SDL_test_common.c
+++ b/src/test/SDL_test_common.c
@@ -2543,29 +2543,31 @@ void SDLTest_CommonEvent(SDLTest_CommonState *state, SDL_Event *event, int *done
 
 void SDLTest_CommonQuit(SDLTest_CommonState *state)
 {
-    int i;
+    if (state) {
+        int i;
 
-    if (state->targets) {
-        for (i = 0; i < state->num_windows; ++i) {
-            if (state->targets[i]) {
-                SDL_DestroyTexture(state->targets[i]);
+        if (state->targets) {
+            for (i = 0; i < state->num_windows; ++i) {
+                if (state->targets[i]) {
+                    SDL_DestroyTexture(state->targets[i]);
+                }
             }
+            SDL_free(state->targets);
         }
-        SDL_free(state->targets);
-    }
-    if (state->renderers) {
-        for (i = 0; i < state->num_windows; ++i) {
-            if (state->renderers[i]) {
-                SDL_DestroyRenderer(state->renderers[i]);
+        if (state->renderers) {
+            for (i = 0; i < state->num_windows; ++i) {
+                if (state->renderers[i]) {
+                    SDL_DestroyRenderer(state->renderers[i]);
+                }
             }
+            SDL_free(state->renderers);
         }
-        SDL_free(state->renderers);
-    }
-    if (state->windows) {
-        for (i = 0; i < state->num_windows; i++) {
-            SDL_DestroyWindow(state->windows[i]);
+        if (state->windows) {
+            for (i = 0; i < state->num_windows; i++) {
+                SDL_DestroyWindow(state->windows[i]);
+            }
+            SDL_free(state->windows);
         }
-        SDL_free(state->windows);
     }
     SDL_Quit();
     SDLTest_CommonDestroyState(state);