sdl12-compat: Fixed function signatures. (be3c2)

SDL Commits
1 
From be3c2ce27eef795a1900fef0a36997bff48ad69a Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Tue, 2 Mar 2021 11:50:02 +0300
Subject: [PATCH] Fixed function signatures.

---
 src/SDL12_compat.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/SDL12_compat.c b/src/SDL12_compat.c
index 33379be..4203d7f 100644
--- a/src/SDL12_compat.c
+++ b/src/SDL12_compat.c
@@ -4546,19 +4546,19 @@ SDL_OpenAudio(SDL_AudioSpec *want, SDL_AudioSpec *obtained)
 /* !!! FIXME: these are just stubs for now, but Sam thinks that maybe these
 were added at Loki for Heavy Gear 2's UI. They just make GL calls. */
 DECLSPEC void SDLCALL
-SDL_GL_Lock()
+SDL_GL_Lock(void)
 {
     FIXME("write me");
 }
 
 DECLSPEC void SDLCALL
-SDL_GL_UpdateRects(int numrects, SDL_Rect *rects)
+SDL_GL_UpdateRects(int numrects, SDL12_Rect *rects)
 {
     FIXME("write me");
 }
 
 DECLSPEC void SDLCALL
-SDL_GL_Unlock()
+SDL_GL_Unlock(void)
 {
     FIXME("write me");
 }