Fixed initializing the Nyko and EVORETRO GameCube adaptors

This requires root on most Linux distributions, as we have to directly send USB messages to the devices to enable input reports.

src/joystick/hidapi/SDL_hidapi_gamecube.c

@@ -32,6 +32,7 @@
 #include "../SDL_sysjoystick.h"
 #include "SDL_hidapijoystick_c.h"
 #include "SDL_hidapi_rumble.h"
+#include "../../hidapi/SDL_hidapi.h"
 
 
 #ifdef SDL_JOYSTICK_HIDAPI_GAMECUBE
@@ -129,6 +130,8 @@ HIDAPI_DriverGameCube_InitDevice(SDL_HIDAPI_Device *device)
     Uint8 initMagic = 0x13;
     Uint8 rumbleMagic = 0x11;
 
+    SDL_EnableGameCubeAdaptors();
+
     ctx = (SDL_DriverGameCube_Context *)SDL_calloc(1, sizeof(*ctx));
     if (!ctx) {
         SDL_OutOfMemory();