Update to SDL 2.0.14 for Windows

Defines:
#undef SDL_JOYSTICK_RAWINPUT
#undef SDL_JOYSTICK_WGI
#define USE_D3D9EX 1

libs/windows/include/SDL_surface.h

@@ -80,7 +80,9 @@ typedef struct SDL_Surface
 
     /** information needed for surfaces requiring locks */
     int locked;                 /**< Read-only */
-    void *lock_data;            /**< Read-only */
+
+    /** list of BlitMap that hold a reference to this surface */
+    void *list_blitmap;         /**< Private */
 
     /** clipping information */
     SDL_Rect clip_rect;         /**< Read-only */
@@ -235,6 +237,13 @@ extern DECLSPEC int SDLCALL SDL_SaveBMP_RW
 extern DECLSPEC int SDLCALL SDL_SetSurfaceRLE(SDL_Surface * surface,
                                               int flag);
 
+/**
+ *  \brief Returns whether the surface is RLE enabled
+ *
+ *  \return SDL_TRUE if the surface is RLE enabled, or SDL_FALSE if the surface is NULL or not RLE enabled
+ */
+extern DECLSPEC SDL_bool SDLCALL SDL_HasSurfaceRLE(SDL_Surface * surface);
+
 /**
  *  \brief Sets the color key (transparent pixel) in a blittable surface.
  *