sdl2-compat: add missing SDLCALL to SDL_GetWindowWMInfo.

From fb44f3d3bda8cbea3bfd0fec5a73a694927559ac Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Fri, 30 Dec 2022 00:40:28 +0300
Subject: [PATCH] add missing SDLCALL to SDL_GetWindowWMInfo.

---
 src/sdl2_compat.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/sdl2_compat.c b/src/sdl2_compat.c
index 0868bb0..9ae6db0 100644
--- a/src/sdl2_compat.c
+++ b/src/sdl2_compat.c
@@ -2009,7 +2009,7 @@ SDLCALL SDL_GetTicks64(void)
 }
 
 DECLSPEC SDL_bool
-SDL_GetWindowWMInfo(SDL_Window *window, SDL_SysWMinfo *wminfo)
+SDLCALL SDL_GetWindowWMInfo(SDL_Window *window, SDL_SysWMinfo *wminfo)
 {
     SDL3_Unsupported();  /* !!! FIXME: write me. */
     return SDL_FALSE;