chore(sdl): fix warning

[FASTSHIFT]

./lv_sim_eclipse_sdl/lv_drivers/sdl/sdl.c:12:5: warning: "LV_USE_GPU_SDL" is not defined, evaluates to 0 [-Wundef] 12 | #if LV_USE_GPU_SDL | ^~~~~~ ./lv_sim_eclipse_sdl/lv_drivers/sdl/sdl.c:109:13: warning: ‘buf’ defined but not used [-Wunused-variable] 109 | static char buf[KEYBOARD_BUFFER_SIZE]; | ^~~ ./lv_sim_eclipse_sdl/lv_drivers/sdl/sdl.c:107:25: warning: ‘wheel_state’ defined but not used [-Wunused-variable] 107 | static lv_indev_state_t wheel_state = LV_INDEV_STATE_RELEASED; | ^~~ ./lv_sim_eclipse_sdl/lv_drivers/sdl/sdl.c:106:16: warning: ‘wheel_diff’ defined but not used [-Wunused-variable] 106 | static int16_t wheel_diff = 0; | ^~~~~~ ./lv_sim_eclipse_sdl/lv_drivers/sdl/sdl.c:104:16: warning: ‘last_y’ defined but not used [-Wunused-variable] 104 | static int16_t last_y = 0; | ^~ ./lv_sim_eclipse_sdl/lv_drivers/sdl/sdl.c:103:16: warning: ‘last_x’ defined but not used [-Wunused-variable] 103 | static int16_t last_x = 0; | ^~ ./lv_sim_eclipse_sdl/lv_drivers/sdl/sdl.c:102:13: warning: ‘left_button_down’ defined but not used [-Wunused-variable] 102 | static bool left_button_down = false; | ^~~~

[kisvegabor]

LV_USE_GPU_SDL was renamed to LV_USE_DRAW_SDL. See in lv_conf_template.h. It it should be used here too.

[FASTSHIFT]

LV_USE_GPU_SDL was renamed to LV_USE_DRAW_SDL. See in lv_conf_template.h. It it should be used here too.

done

[kisvegabor]

Thanks!