SDL: Fix clang-tidy error on LLVM 16.

From ea093378a29b786edbaa265045638f66d7f83d8b Mon Sep 17 00:00:00 2001
From: Pierre Wendling <[EMAIL REDACTED]>
Date: Thu, 23 Mar 2023 14:04:24 -0400
Subject: [PATCH] Fix clang-tidy error on LLVM 16.

Starting LLVM 16, clang-diagnostic-implicit-function-declaration is
treated as an error.
---
 include/SDL3/SDL_stdinc.h | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/include/SDL3/SDL_stdinc.h b/include/SDL3/SDL_stdinc.h
index 78afe3a02ccc..d75bf2fac942 100644
--- a/include/SDL3/SDL_stdinc.h
+++ b/include/SDL3/SDL_stdinc.h
@@ -690,6 +690,11 @@ size_t strlcpy(char* dst, const char* src, size_t size);
 size_t strlcat(char* dst, const char* src, size_t size);
 #endif
 
+/* Starting LLVM 16, the analyser errors out if these functions do not have
+   their prototype defined (clang-diagnostic-implicit-function-declaration) */
+#include <stdlib.h>
+#include <string.h>
+
 #define SDL_malloc malloc
 #define SDL_calloc calloc
 #define SDL_realloc realloc