winebus: Print SDL error message when SDL cannot be initialized.

SDL_Init(SDL_INIT_HAPTIC) fails if SDL is built without haptic support.

Signed-off-by: Józef Kucia <jkucia@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>

dlls/winebus.sys/bus_sdl.c

@@ -910,7 +910,7 @@ static DWORD CALLBACK deviceloop_thread(void *args)
 
     if (pSDL_Init(SDL_INIT_GAMECONTROLLER|SDL_INIT_HAPTIC) < 0)
     {
-        ERR("Can't Init SDL\n");
+        ERR("Can't init SDL: %s\n", pSDL_GetError());
         return STATUS_UNSUCCESSFUL;
     }