Add SDL_guid.h to the global SDL header
diff --git a/include/SDL.h b/include/SDL.h
index 7cdd324..12e7f31 100644
--- a/include/SDL.h
+++ b/include/SDL.h
@@ -41,6 +41,7 @@
#include "SDL_events.h"
#include "SDL_filesystem.h"
#include "SDL_gamecontroller.h"
+#include "SDL_guid.h"
#include "SDL_haptic.h"
#include "SDL_hidapi.h"
#include "SDL_hints.h"