Add SDL_HINT_DIRECTINPUT_ENABLED (on by default)

src/haptic/windows/SDL_dinputhaptic.c

@@ -27,6 +27,7 @@
 
 #if SDL_HAPTIC_DINPUT
 
+#include "SDL_hints.h"
 #include "SDL_stdinc.h"
 #include "SDL_timer.h"
 #include "SDL_windowshaptic_c.h"
@@ -77,6 +78,11 @@ SDL_DINPUT_HapticInit(void)
         return SDL_SetError("Haptic: SubSystem already open.");
     }
 
+    if (!SDL_GetHintBoolean(SDL_HINT_DIRECTINPUT_ENABLED, SDL_TRUE)) {
+        /* In some environments, IDirectInput8_Initialize / _EnumDevices can take a minute even with no controllers. */
+        return 0;
+    }
+
     ret = WIN_CoInitialize();
     if (FAILED(ret)) {
         return DI_SetError("Coinitialize", ret);