fixed windows build after commit 7e8be3f
diff --git a/src/video/windows/SDL_windowsclipboard.c b/src/video/windows/SDL_windowsclipboard.c
index 892af0d..df8a404 100644
--- a/src/video/windows/SDL_windowsclipboard.c
+++ b/src/video/windows/SDL_windowsclipboard.c
@@ -24,6 +24,7 @@
#include "SDL_windowsvideo.h"
#include "SDL_windowswindow.h"
+#include "SDL_timer.h"
#include "../../events/SDL_clipboardevents_c.h"
#ifdef UNICODE