Small modification to be able to change the color of the label of a checkbox

Feature request
1

void lv_cb_set_style(lv_obj_t * cb, lv_cb_style_t type, const lv_style_t * style)
{
lv_cb_ext_t * ext = lv_obj_get_ext_attr(cb);

switch(type) {
    case LV_CB_STYLE_BG:
        lv_btn_set_style(cb, LV_BTN_STYLE_REL, style);
        lv_btn_set_style(cb, LV_BTN_STYLE_PR, style);
        lv_btn_set_style(cb, LV_BTN_STYLE_TGL_REL, style);
        lv_btn_set_style(cb, LV_BTN_STYLE_TGL_PR, style);
        lv_btn_set_style(cb, LV_BTN_STYLE_INA, style);

	**lv_label_set_style (ext->label, LV_LABEL_STYLE_MAIN, style);**

        break;
    case LV_CB_STYLE_BOX_REL: lv_btn_set_style(ext->bullet, LV_BTN_STYLE_REL, style); break;
    case LV_CB_STYLE_BOX_PR: lv_btn_set_style(ext->bullet, LV_BTN_STYLE_PR, style); break;
    case LV_CB_STYLE_BOX_TGL_REL: lv_btn_set_style(ext->bullet, LV_BTN_STYLE_TGL_REL, style); break;
    case LV_CB_STYLE_BOX_TGL_PR: lv_btn_set_style(ext->bullet, LV_BTN_STYLE_TGL_PR, style); break;
    case LV_CB_STYLE_BOX_INA: lv_btn_set_style(ext->bullet, LV_BTN_STYLE_INA, style); break;
}

}

2

Please send a pull request to https://github.com/littlevgl/lvgl.