Reduce delay to 1 ms in SDL_WaitEventTimeout() and SDL_WaitEvent()

The 10 ms delay effectively caps input polling at 100 Hz and rendering
at 100 FPS if applications use these functions in their event loop. The
delay may also lead to dropped frames even at 60 FPS due if they are
unlucky enough to hit the delay and rendering takes longer than 6 ms.

src/events/SDL_events.c

@@ -728,7 +728,7 @@ SDL_WaitEventTimeout(SDL_Event * event, int timeout)
                 /* Timeout expired and no events */
                 return 0;
             }
-            SDL_Delay(10);
+            SDL_Delay(1);
             break;
         default:
             /* Has events */