[gcc r16-5972] Ada: Add missing #include for MinGW

[Eric Botcazou]

https://gcc.gnu.org/g:9d5395a98f16fd47fba727557f1810b28e76d0c1

commit r16-5972-g9d5395a98f16fd47fba727557f1810b28e76d0c1
Author: Eric Botcazou <ebotcazou@adacore.com>
Date:   Mon Dec 8 22:34:20 2025 +0100

    Ada: Add missing #include for MinGW
    
    This adds a missing #include for <stdlib.h> and removes redundant ones.
    
    gcc/ada/
            PR ada/123037
            * rtinit.c [__MINGW32__]: Include <stdlib.h> and not <windows.h>.
            * rtfinal.c [__MINGW32__]: Do not include <windows.h>.

Diff:
---
 gcc/ada/rtfinal.c | 2 --
 gcc/ada/rtinit.c  | 3 +--
 2 files changed, 1 insertion(+), 4 deletions(-)

diff --git a/gcc/ada/rtfinal.c b/gcc/ada/rtfinal.c
index 88bbb0e3e500..0bd3ce4ace65 100644
--- a/gcc/ada/rtfinal.c
+++ b/gcc/ada/rtfinal.c
@@ -46,9 +46,7 @@ extern int __gnat_rt_init_count;
 /*  see initialize.c  */
 
 #if defined (__MINGW32__)
-#define WIN32_LEAN_AND_MEAN
 #include "mingw32.h"
-#include <windows.h>
 
 extern CRITICAL_SECTION ProcListCS;
 extern HANDLE ProcListEvt;
diff --git a/gcc/ada/rtinit.c b/gcc/ada/rtinit.c
index 598550c4051c..3b5af0dfb01a 100644
--- a/gcc/ada/rtinit.c
+++ b/gcc/ada/rtinit.c
@@ -70,9 +70,8 @@ int __gnat_rt_init_count = 0;
    and finalize properly the run-time. */
 
 #if defined (__MINGW32__)
-#define WIN32_LEAN_AND_MEAN
+#include <stdlib.h>
 #include "mingw32.h"
-#include <windows.h>
 
 extern void __gnat_init_float (void);