Found the following errors while testing to add images to wiki in Nwiki or creole format (MDL-26392)

Notice: Undefined variable: newcontent in /m20/moodle/mod/wiki/edit.php on line 88
Notice: Undefined variable: context in /m20/moodle/mod/wiki/pagelib.php on line 1916
Notice: Trying to get property of non-object in /m20/moodle/mod/wiki/pagelib.php on line 1916

To reproduce:
1. create new wiki (either creole or nwiki)
2. upload img file
3. add uploaded image on edit page and save.

Also noticed in mod/wiki/edit.php on line 48, there is a variable called $newconent. I think this is suppose to be $newcontent.

[code]
$newconent = '';
if (!empty($newcontent) && is_array($newcontent))

[/code]