SDL3: display+window: runtime fixes

Author: ankith26

src_c/_pygame.h

@@ -167,6 +167,8 @@ PG_GetSurfaceFormat(SDL_Surface *surf)
 
 #define PG_GetSurfaceClipRect SDL_GetSurfaceClipRect
 
+#define PG_GL_SetSwapInterval SDL_GL_SetSwapInterval
+
 #else /* ~SDL_VERSION_ATLEAST(3, 0, 0)*/
 #define PG_ShowCursor() SDL_ShowCursor(SDL_ENABLE)
 #define PG_HideCursor() SDL_ShowCursor(SDL_DISABLE)
@@ -375,6 +377,12 @@ PG_GetSurfaceClipRect(SDL_Surface *surface, SDL_Rect *rect)
     *rect = surface->clip_rect;
     return true;
 }
+
+static inline bool
+PG_GL_SetSwapInterval(int interval)
+{
+    return SDL_GL_SetSwapInterval(interval) == 0;
+}
 #endif
 
 /* DictProxy is useful for event posting with an arbitrary dict. Maintains