don't fetch timestamp again

src/video/windows/SDL_windowsevents.c

@@ -719,11 +719,11 @@ static void WIN_HandleRawMouseInput(Uint64 timestamp, SDL_VideoData *data, HANDL
         if (rawmouse->usButtonFlags & RI_MOUSE_WHEEL) {
             SHORT amount = (SHORT)rawmouse->usButtonData;
             float fAmount = (float)amount / WHEEL_DELTA;
-            SDL_SendMouseWheel(WIN_GetEventTimestamp(), window, mouseID, 0.0f, fAmount, SDL_MOUSEWHEEL_NORMAL);
+            SDL_SendMouseWheel(timestamp, window, mouseID, 0.0f, fAmount, SDL_MOUSEWHEEL_NORMAL);
         } else if (rawmouse->usButtonFlags & RI_MOUSE_HWHEEL) {
             SHORT amount = (SHORT)rawmouse->usButtonData;
             float fAmount = (float)amount / WHEEL_DELTA;
-            SDL_SendMouseWheel(WIN_GetEventTimestamp(), window, mouseID, fAmount, 0.0f, SDL_MOUSEWHEEL_NORMAL);
+            SDL_SendMouseWheel(timestamp, window, mouseID, fAmount, 0.0f, SDL_MOUSEWHEEL_NORMAL);
         }
 
         /* Invalidate the mouse button flags. If we don't do this then disabling raw input