fix(scroll): fix infinite loop in scroll_end events (#6109)

src/core/lv_obj_scroll.c

@@ -677,7 +677,8 @@ static void scroll_y_anim(void * obj, int32_t v)
 
 static void scroll_end_cb(lv_anim_t * a)
 {
-    lv_obj_send_event(a->var, LV_EVENT_SCROLL_END, NULL);
+    /*Do not sent END event if there wasn't a BEGIN*/
+    if(a->start_cb_called) lv_obj_send_event(a->var, LV_EVENT_SCROLL_END, NULL);
 }
 
 static void scroll_area_into_view(const lv_area_t * area, lv_obj_t * child, lv_point_t * scroll_value,

src/layouts/flex/lv_flex.c

@@ -96,7 +96,6 @@ void lv_flex_init(void)
 {
     layout_list_def[LV_LAYOUT_FLEX].cb = flex_update;
     layout_list_def[LV_LAYOUT_FLEX].user_data = NULL;
-
 }
 
 void lv_obj_set_flex_flow(lv_obj_t * obj, lv_flex_flow_t flow)

src/misc/lv_anim.c

@@ -353,9 +353,6 @@ static void anim_timer(lv_timer_t * param)
     lv_anim_t * a = _lv_ll_get_head(anim_ll_p);
 
     while(a != NULL) {
-
-        //        printf("%p, %d\n", a, a->start_value);
-
         uint32_t elaps = lv_tick_elaps(a->last_timer_run);
         a->act_time += elaps;