Add missing NULL-terminator for inputDescriptors

libretro/libretro-core.c

@@ -496,7 +496,8 @@ void retro_init(void)
       { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R2, "R2" },
       { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L2, "L2" },
       { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_R3, "R3" },
-      { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "L3" }
+      { 0, RETRO_DEVICE_JOYPAD, 0, RETRO_DEVICE_ID_JOYPAD_L3, "L3" },
+      { 0,                   0, 0,                         0, NULL } 
    };
    environ_cb(RETRO_ENVIRONMENT_SET_INPUT_DESCRIPTORS, &inputDescriptors);