jQuery.each breaks on undefined object

by Akram kamal

HTML

<div class="content"></div>

JavaScript

var person =[{
   'name': 'john',
   'age':12,
   'img': [
      {
         'thumb' : 'http://placehold.it/75x75',
         'full'  : 'http://placehold.it/200x200'
      }
   ]
},
{
   'name': 'Mat',
   'age':12
},
{
   'name': 'Mat',
   'age':12
},
{
   'name': 'Kirk',
   'age':12,
   'img': [
      {
         'thumb' : 'http://placehold.it/75x75',
         'full'  : 'http://placehold.it/200x200'
      }
   ]
}]

$.each(person, function(i,v){
    if (v.img)
   $('.content').append('<img src="'+ v.img[0].thumb +'">')
})