SDL: Call DirkSimple_shutdown() before destroying SDL-specific resources.

Otherwise you end up destroying textures after the renderer has been destroyed.

Author: icculus

dirksimple_sdl.c

@@ -287,6 +287,8 @@ void DirkSimple_cleardiscaudio(void)
 
 void mainloop_shutdown(void)
 {
+    DirkSimple_shutdown();
+
     SDL_DestroyTexture(GLaserDiscTexture);
     SDL_DestroyRenderer(GRenderer);
     SDL_DestroyWindow(GWindow);
@@ -307,8 +309,6 @@ void mainloop_shutdown(void)
         GGameController = NULL;
     }
 
-    DirkSimple_shutdown();
-
     SDL_Quit();
 }