fix(dropdown): fix selecting options after the last one

fix #1996

CHANGELOG.md

@@ -4,6 +4,7 @@
 
 ### Bugfixes
 - fix(cpicker) fix division by zero 
+- fix(dropdown) fix selecting options after the last one 
 
 ## v7.9.0 (Plann1d at 05.01.2020
 

src/lv_widgets/lv_dropdown.c

@@ -1298,6 +1298,7 @@ static void page_press_handler(lv_obj_t * page)
 
 static uint16_t get_id_on_point(lv_obj_t * ddlist, lv_coord_t y)
 {
+    lv_dropdown_ext_t * ext          = lv_obj_get_ext_attr(ddlist);
     lv_obj_t * label = get_label(ddlist);
     if(label == NULL) return 0;
     y -= label->coords.y1;
@@ -1311,6 +1312,7 @@ static uint16_t get_id_on_point(lv_obj_t * ddlist, lv_coord_t y)
 
     uint16_t opt = y / h;
 
+    if(opt >= ext->option_cnt) opt = ext->option_cnt - 1;
     return opt;
 }