sdl12-compat: Simplified the SDL_GetWMInfo-requests-SDL2-details code.

From 52459d2b8a68f77afda504da4e93887c8ed1fbd0 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Thu, 8 Sep 2022 13:20:54 -0400
Subject: [PATCH] Simplified the SDL_GetWMInfo-requests-SDL2-details code.

This patch written by @kjliew.

Fixes #186.
---
 include/SDL/SDL_syswm.h |  2 +-
 src/SDL12_compat.c      | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/include/SDL/SDL_syswm.h b/include/SDL/SDL_syswm.h
index 007618d10..4321a07a0 100644
--- a/include/SDL/SDL_syswm.h
+++ b/include/SDL/SDL_syswm.h
@@ -109,7 +109,7 @@ real SDL-1.2 available to you. */
         typedef struct SDL_SysWMinfo
         {
             SDL_version version;
-            int data;
+            void *data;
         } SDL_SysWMinfo;
 
 #       include "close_code.h"
diff --git a/src/SDL12_compat.c b/src/SDL12_compat.c
index 9c0d81543..2a379826f 100644
--- a/src/SDL12_compat.c
+++ b/src/SDL12_compat.c
@@ -6981,6 +6981,16 @@ SDL_GetWMInfo(SDL12_SysWMinfo *info12)
     int rc;
 
     if (info12->version.major > 1) {
+        if (info12->version.major == 2) {
+#if defined(SDL_VIDEO_DRIVER_WINDOWS)
+            info12->window = (HWND)VideoWindow20;
+#elif defined(SDL_VIDEO_DRIVER_X11)
+            info12->info.x11.gfxdisplay = (Display *)VideoWindow20;
+#else
+            info12->data = (void *)VideoWindow20;
+#endif
+            return 1;
+        }
         SDL20_SetError("Requested version is unsupported");
         return 0;  /* some programs only test against 0, not -1 */
     } else if (!SupportSysWM) {