SDL: SDL_test: add include for SDLTest_CommonState

SDL Commits
1 
From 26728c321fa9ba5300e90fc14f32fa1f974b9ab8 Mon Sep 17 00:00:00 2001
From: Anonymous Maarten <[EMAIL REDACTED]>
Date: Fri, 6 Sep 2024 14:23:08 +0200
Subject: [PATCH] SDL_test: add include for SDLTest_CommonState

---
 include/SDL3/SDL_test_harness.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/SDL3/SDL_test_harness.h b/include/SDL3/SDL_test_harness.h
index cfd538a086f55..cea0db465f46c 100644
--- a/include/SDL3/SDL_test_harness.h
+++ b/include/SDL3/SDL_test_harness.h
@@ -37,6 +37,7 @@
 #define SDL_test_h_arness_h
 
 #include <SDL3/SDL_stdinc.h>
+#include <SDL3/SDL_test_common.h> /* SDLTest_CommonState */
 
 #include <SDL3/SDL_begin_code.h>
 /* Set up for C function definitions, even when using C++ */